Remove commented out code.
Do not link newly created dataset from top menu.
Clean up code.
Do not disable option depending on context.
Remove items from menus.
Review pop-up menu layout to align clients.
Clean up code.
Add option to create dataset for orphaned images.
Remove unused import.
Remove option to create dataset from toolbar.
Review layout of menu to match layout of Tree Viewer menu.
Merge pull request #1531 from jburel/rebased/develop/pdi-creation

Pdi creation (rebased onto develop)