Changes in 0.9.7
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Presentation:
    * Improve presentation for sliders.
    * Presentation for a watched object is not interrupted anymore by the
       presentation for focus tracking.

Miscelaneous:
    * Generate a beep instead of exiting in case of failure to register a
       listener for an event.

Speech:
    * Change values for rate and pitch for voice from percents to absolute
        values (including minimum and maximum in UI.

Brlmon:
    * Make brlmon to act as a panel (do not let other window to overlap it). 

Magnifier:
    * Make zoom factor x and y floats from int.

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