BUG #14376: Fix settings dialog layout.

Fixed layout issues with the application settings dialog. Also added tooltips to
the options shown on the first page of the application settings dialog.

Change-Id: Ibe8edda756d1f18e2cf8da9ed8320a338b53310f
Merge topic '14376_fix_settings_dialog' into next

f296465 BUG #14376: Fix settings dialog layout.