Fix various track session handling related bugs like unexpected
selected item change when mouse button was not pressed inside list view
or not currently pressed at all.
Use `fTrack->is_active` to indicate that track session is active.
Remove `fTrack->buttons` because exact mouse button is never checked in
code.
Remove some redundant conditions.
Remove now not needed workaround in `BColorListView::MouseUp`.
Change-Id: Ic4ac846019bd71af008c936dd8d7d265326cba9a
Reviewed-on: https://review.haiku-os.org/c/haiku/+/10968
Haiku-Format: Haiku-format Bot <[email protected]>
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: John Scipione <[email protected]>
X512
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