Removed plug-in org.simantics.proconf.ui.workbench and moved its contents into org...

Removed plug-in org.simantics.proconf.ui.workbench and moved its contents into org.simantics.proconf.ui.

 - There was no clear reason for the ui.workbench plug-in to exist. There is really no point in creating separate plug-ins unless there is a real need - useless separation of concerns tends to bloat plug-in dependency chains and generally make code management harder.
 - Removed almost all dependencies on the plug-in, but if you still run across any, just remove them and use org.simantics.proconf.ui instead.
 - Note that also the 3 extension points in org.simantics.proconf.ui.workbench were moved to org.simantics.proconf.ui which means your plugin.xml's may need fixing - just remove the .workbench. The extensions points are:
  - perspectiveBars
  - perspectiveContextBinding
  - resourceEditorAdapter

git-svn-id: https://www.simantics.org/svn/simantics/3d/branches/dev@6832 ac1ea38d-2e2b-0410-8846-a27921b304fc