- brute force attempt at making JabRef runnable with Java 9
- simply removed all the things Java 9 complains about (without fix yet)

Split Packages:
- LibreOffice
- ArchUnit

Invalid Module Name:
- Latex2Unicode

Internal APIs:
- only JFX

org.jabref is now an open package to allow all reflective access, which
guava makes extensive use.
Also more packages are exported.

* Remove dndtabpane dependency, as it accesses classes that are no
  longer part of the JDK.
* Add explicit dependency on fontawesomefx-commons, as the
  materialdesignfont, has a dependency on an older version (?), that is
  not compatible with Java 9.
* Remove LibreOffice integration at newly introduced occasions.
* Add ResourceLocator for afterburner.fx.

* upstream/maintable-beta:
  set look and feel to windows, aqua or nimbus for swing in case
  fix import
  remove look and feel
  New translations JabRef_en.properties (French) (#4009)
  Fix Look and Feel related issues (#4002)
  Fix statement in changelog
  [WIP] Add Text File Export for "Find Unlinked Files" (#3979)

* Add button for union/intersection in the groups side panel
Fix display ofs state in preferences

* add method for getting addtionalHeaderButtons
create enum with icons
change booleans to enum
remove duplicated code
remove old prefs

* remove uncommented code

* fix checkstyle

* Add group intersection and union icons

* add tooltips for side pane and groups pane

* Extract get graphics and tooltip to new class
return headerbuttons as list

* refactor and extract icon method to view model
make prefs private

* Reimplement tooltips for file and identifier column

* Extract not translatable strings out of localization

* upstream/maintable-beta: (46 commits)
  update gradle to 4.7 (#4049)
  Add missing translation for "HTML to Unicode" (#4046)
  New Crowdin translations (#4042)
  Use all-text-fields magic also in BibTeX cleanup. (#4039)
  Switch to org.postgresql (#4031)
  Fix freeze when importing (#4037)
  Use JavaFX-native SVGPath for logo in About dialog (#4035)
  Remove reflection hack to set WM_CLASS (#4034)
  Fix initial freeze when downloading files
  Inline comment
  Move color related method
  Extract dialog service to field
  Extract dialog service to field
  Remove unused class
  Show tooltip for icon-based columns
  Remove commented-out code
  Convert static methods to instance members (and fix spelling)
  Fix formatting
  Fix formatting
  Remove unused argument
  ...

# Conflicts:
#	build.gradle
#	gradle/wrapper/gradle-wrapper.properties
#	src/main/java/org/jabref/gui/GUIGlobals.java
#	src/main/java/org/jabref/gui/SidePaneComponent.java
#	src/main/java/org/jabref/gui/groups/GroupModeViewModel.java
#	src/main/java/org/jabref/gui/groups/GroupSidePane.java
#	src/main/java/org/jabref/gui/help/AboutDialogView.java
#	src/main/java/org/jabref/gui/openoffice/OpenOfficePanel.java
#	src/main/java/org/jabref/logic/shared/PostgreSQLProcessor.java
#	src/main/resources/l10n/JabRef_en.properties

# Conflicts:
#	build.gradle
#	src/main/java/org/jabref/logic/l10n/Localization.java

# Conflicts:
#	build.gradle
#	src/main/java/org/jabref/gui/fieldeditors/EditorTextArea.java
#	src/main/java/org/jabref/gui/openoffice/OpenOfficePanel.java

# Conflicts:
#	build.gradle

* upstream/master: (229 commits)
  Try to fix not on FX thread for search and autocomplete (#4618)
  Convert DuplicateResolverDialog to javafx (#4601)
  Fix for BibTex source tab parsing issue if field contains {} (#4581)
  Convert OO/LO SidePanel to javafx (#4341)
  Convert "Customize importer" dialog to JavaFX (#4608)
  Convert "From Aux file" dialog to JavaFX (#4607)
  Convert "Show preferences" dialog to JavaFX (#4605)
  Fix not on FX thread exception
  Force javafx to run thread (#4604)
  Convert new version dialog to JavaFX (#4602)
  Add a variable to track the change in preview style (#4587)
  Solution for submitting dialog with Ctrl + Enter (#4496) (#4592)
  Bump mysql-connector-java from 8.0.13 to 8.0.14 (#4599)
  Fix overlapping font in id entry type (#4595)
  update jfoenix and gradle plugins Replace outdated transformer log4j2 with official new one
  Update journalList.txt
  Fix for Issue #4437 - Some bugs in preference->Entry table columns (#4546)
  Don't set column sort type at startup (#4577)
  Add uncaught exception message (#4565)
  Converts integrity check dialog to JavaFX (#4559)
  ...

# Conflicts:
#	build.gradle
#	src/main/java/org/jabref/gui/FindUnlinkedFilesDialog.java
#	src/main/java/org/jabref/gui/JabRefFrame.java
#	src/main/java/org/jabref/gui/fieldeditors/EditorTextArea.java
#	src/main/java/org/jabref/gui/fieldeditors/EditorTextField.java
#	src/main/java/org/jabref/gui/openoffice/CitationManager.java
#	src/main/java/org/jabref/gui/openoffice/OOBibBase.java
#	src/main/java/org/jabref/gui/openoffice/OpenOfficePanel.java
#	src/main/java/org/jabref/gui/openoffice/OpenOfficeSidePanel.java

* upstream/master: (184 commits)
  Try to update to gradle 5.0.2 (#4766)
  Post change notifications on JavaFX (#4871)
  fix missing l10n from previous merge
  fix compile error
  Fix right clicking on any entry and selecting "Open folder" results in the NullPointer exception (#4797)
  Bump fontbox from 2.0.14 to 2.0.15 (#4882)
  Bump pdfbox from 2.0.14 to 2.0.15 (#4881)
  Bump xmpbox from 2.0.14 to 2.0.15 (#4883)
  Bump mockito-core from 2.26.0 to 2.27.0 (#4879)
  Bump java-string-similarity from 1.1.0 to 1.2.1 (#4878)
  Fix JabRef dying silently without enough inotify instances (#4875)
  #4795 disable menu item if database not connected (#4828)
  Remove deprecated awt apple extension (#4860)
  Fix IllegalArgumentException when ranking entries (#4779)
  Bump junit-vintage-engine from 5.4.1 to 5.4.2 (#4866)
  Bump junit-platform-launcher from 1.4.1 to 1.4.2 (#4865)
  Bump junit-jupiter from 5.4.1 to 5.4.2 (#4867)
  Add author normalizer for medline import (#4863)
  Fixed group creation with default settings (#4801)
  removed default constructor of FXDialogService (#4847)
  ...

# Conflicts:
#	build.gradle
#	src/main/java/org/jabref/gui/JabRefFrame.java
#	src/main/java/org/jabref/gui/collab/ChangeDisplayDialog.java
#	src/main/java/org/jabref/gui/collab/EntryChangeViewModel.java

# Conflicts:
#	src/main/java/module-info.java

# By Carl Christian Snethlage (33) and others
# Via GitHub (21) and Carl Christian Snethlage (2)
* upstream/master: (103 commits)
  Bump junit-vintage-engine from 5.4.2 to 5.5.0
  Bump log4j-api from 2.11.2 to 2.12.0
  Bump junit-platform-launcher from 1.4.2 to 1.5.0
  Bump log4j-core from 2.11.2 to 2.12.0
  Bump log4j-slf4j18-impl from 2.11.2 to 2.12.0
  Bump log4j-jul from 2.11.2 to 2.12.0
  Bump junit-jupiter from 5.4.2 to 5.5.0
  Bump com.github.johnrengelman.shadow from 5.0.0 to 5.1.0
  Bump log4j-jcl from 2.11.2 to 2.12.0
  Bump fontbox from 2.0.15 to 2.0.16 (#5080)
  Bump pdfbox from 2.0.15 to 2.0.16 (#5081)
  Bump xmpbox from 2.0.15 to 2.0.16 (#5082)
  Update FUNDING.yml
  Delete autoapproval.yml
  Bump com.install4j.gradle from 7.0.11 to 7.0.12 (#5077)
  Configure autoapproval plugin for dependabot
  Bump xmlunit-matchers from 2.6.2 to 2.6.3 (#5074)
  Bump checkstyle from 8.21 to 8.22 (#5072)
  Bump xmlunit-core from 2.6.2 to 2.6.3 (#5073)
  Refactor for loop to stream in groupTree Close version socket
  ...

# Conflicts:
#	build.gradle

# Conflicts:
#	build.gradle

…ble empty lines)

This hopefully fixes 'java.lang.RuntimeException: No toolkit found'

# Conflicts:
#	build.gradle

Replace wrong import

never thrown