Updated the included user manual html files

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Update ReleaseNotes

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Ruler: fix weird behaviour near x = 0

RulerNodeItem2::recalculate() does something which is
apparently not a good idea in combination with
RulerNodeItem2::mouseMoveEvent().

Each time the mouse moves, setPos() is called. Then in
recalculate() the x() value is checked and if less than 0
it's changed to x = 0 (setPos(0, y());).

This last call (setPos(0, y());)
however does not work and the value remains less than zero
leaving one of the ruler points outside of the graph.

To solve the issue we add a silly explicit check if x() < 0
before calling setPos() in RulerNodeItem2::mouseMoveEvent().

The 'x() > timeAxis->posAtValue(data->sec)' strangely works
on the other hand.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Only show tags in filter panel that are actually used

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Latest translations

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Preparing for 4.3 Beta 1

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>