... and works in any of the six tools.
Click and drag in select tool during scrub works just as when not scrubbing.
Seeks now only if you left-click or drag in the ruler, but this may change.
Mouse motion anywhere on the screen controls scrub as before.
No mouse clicks in TrackPanel are used by scrubbing.
The Ctrl-Click in TrackPanel is now unused. Should 2.1.0 behavior be restored?
That was click to quick play, redundant with click in the (lower part of) the
ruler.
... This includes new always-seeking modes unlike scrubbing which can switch
to seeking and back according to the left mouse button state.
The reason for this is that visually impaired users should not be required to
click with the mouse in the track panel window to signal seeking. But mouse
movements can still control scrubbing, because we poll the global mouse
position in the timer, not relying on events from any window object.
