added connection error messages to console view
commit merged handling for papyrus .uml files from local development to COMPASS branch
adjusted signal view graphs so that they all have the same x-range
fixed PR #233: Problem when opening the Properties/RT-Tester window
Merge commit 'b4177db373893505545566cb8e5cca43e58d27ff' into uwe
Fix for null-pointer exception following the fix for PR#233