Changes

Restore modal views when switching outline

When displaying an outline by default only the bench is visible and all
views are in the background (dialogs are activated). If there are modal
views open they should be activated since otherwise navigation in the
tree is possible.

265232

Change-Id: I20f13d99835b0ff73018d4e0ed2ffcd6d10eee8a
Signed-off-by: Ralf Muri <ralf.muri@bsi-software.com>
Reviewed-on: https://git.eclipse.org/r/161010
Tested-by: CI Bot
Reviewed-by: Beat Schwarzentrub <bsh@bsiag.com>