Bug 493074 - Compilation error using IDialogConstants and with RAP UI

Replace constants in ElementListSelectionDialog with Strings. 
Also remove a couple of warnings in the package.

Change-Id: I039dfe97a24ba24959839144101a26c527eae848
6 files changed
tree: a8c601bf73bc16e4888823a2a100d7965330f779
  1. .gitignore
  2. EMFStoreDeveloper/
  3. bundles/
  4. features/
  5. releng/
  6. tests/