Some fixes in prediction
Cancellation
Merge remote-tracking branch 'origin/develop' into f-predictor-async-cancellation
Fix prediction configuration panel
Fix help click null ref
Cancel running task and start new prediction task
Merge remote-tracking branch 'origin/f-predictor-fix' into develop
fixes : no more infinite loop with the mouse keyboard + (see below)

- Autoclick cursor indicator
- Scrolling : Pause/Resume fixed (used to register when resuming)
the word predictor now reacts to the new sendkey service
The prediction doesn't add a space when the predicted word ends with an apostrophe ( ' ).
Making sure Sybille predicts words after an apostrophe
fixing the scroller, releasing patch 2.6.1