ProgressIntermediateDialog renamed and made singleton
Missed files from last commit, and show progress dialog on undo and redo (no dismiss yet)
added hasNextCommand() to CommandManager and check it in doDraw() before dismiss
Changed formatting: line wrap at 80
Copied UndoRedoIntegrationTest from old ticket branch
Replaced Dialog member with singleton in Test
testUndoIsShowing, testRedoIsShowing
testDialogIsNotCancelable
fix testing errors
Merge pull request #150 from Catrobat/11.08_UndoRedoProgressDialog_v3

11.08 undo redo progress dialog v3
Implementation: @schmidiM [ms], @dladenhauf [dl]
Acceptance: @galstc05 [sg]