Update VE core submodule to master (ddbedd1)

New changes:
6aecd62 Use selected annotations when replacing content
02d3a27 Only showSelection if checkSequences actually matched something
52d544b Followup 166a52b: don't disable tools that don't have commands

Change-Id: I8f43c9e85b6c43a4ebc3dfaacf4a1fdf3bd94cd0