Bypass the form URL when the app is opened from a clicked link or a push notification

[marc-farre]

When clicking on a link (e.g. a notification email) or a push notification, the URL should be pre-filled with the base URL of the platform.
Currently the URL field is either blank, or displays the previous visited Humhub URL.

Related to #79

[marc-farre]

@PrimozRatej I've renamed the title, because I think that when the app is opened from a clicked link or a push notification there is no need to ask for the URL.

The problem occurs in 2 situations:

• The notification is from a Humhub instance different from the one currently opened in the app
• The FireBase Device registration is lost (happens after a certain time): see Push Service for the Android mobile app not working anymore fcm-push#30 (comment) -> item 3

[marc-farre]

@PrimozRatej the problem also occurs in this situation :

1. Close the app (swiping it up in the apps switcher)
2. Click on a notification link in an email

[marc-farre]

@PrimozRatej This issue is solved when clicking on an email notification link.
But it remains when clicking on a push notification (the native Android notification).
Thanks!

@luke- can you reopen it?

[marc-farre]

@PrimozRatej the issue only occurs when the app was closed.

[PrimozRatej]

Hey @marc-farre, #206 should fix this.

[marc-farre]

@PrimozRatej I will test as soon as a new release of the app is available.

[luke-]

Just released .108

[marc-farre]

@luke- Thanks!
@PrimozRatej It works perfectly now, thanks!