o.c.epics.pvtree: Fix NPE when no other view open
Merge pull request #517 from ControlSystemStudio/bug516

o.c.epics.pvtree: Fix NPE when no other view open
OPEN - task #514: Alarm config dialog: Make non-blocking 
http://github.com/ControlSystemStudio/cs-studio/issues/issue/514

Fixing the javadocs
Merge branch 'master' of https://github.com/ControlSystemStudio/cs-studio.git
Merge pull request #520 from shroffk/master

Issue #514
Merge remote-tracking branch 'origin/master' into sns4