Be tolerant of failure to load file icons on Windows

File icons loader is not 100% reliable because it doesn't fully support
all possible syntaxes. For example, files associated with Notepad on
Windows 11 will have a weird non-path like
@{Microsoft.WindowsNotepad_11.***?ms-resource://***/txtfile.png}
which is not worth parsing.

Not showing an icon is fine, but throwing error messages at the user,
particularly ones they cannot resolve, is not.

src/recent_files.cpp

@@ -168,6 +168,9 @@ class file_icons
             fullname << ';' << loc.GetIndex();
         }
 #endif
+        // suppress logging of icon loading errors beyond our control:
+        wxLogNull nolog;
+
         wxIcon icon(fullname, wxBITMAP_TYPE_ICO, desiredSize, desiredSize);
         if (!icon.IsOk())
             icon.LoadFile(fullname, wxBITMAP_TYPE_ICO);