Enable Autotools UI tests which use SWTBot.

Change-Id: I4269954635a3d7a534092daf8a85c4c8be6cc63b
Reviewed-on: https://git.eclipse.org/r/33143
Tested-by: Hudson CI
Reviewed-by: Jeff Johnston <jjohnstn@redhat.com>
Tested-by: Jeff Johnston <jjohnstn@redhat.com>
Fixed broken tests.
Bug 419399 - Preference for Format with no selection

More robust implementation of region expansion.