Add platform actions to configurations view

- Add the "Collapse All" and "Link with Editor" platform actions to 
  the configurations view.
- Fix capitalization of "Select Configuration Folder" action according
  to eclipse's UI guidelines. 
  See: http://wiki.eclipse.org/User_Interface_Guidelines#Capitalization
Merge pull request #687 from LiamHD/master

Add platform actions to configurations view - Thanks Matthias for this contribution