fixed EnvelopeContainer drawing bug

Signed-off-by: Maximilian Marcoll <quince@maximilianmarcoll.de>
Guide numbers are not fixed on the left side of the visible area of the session!

Signed-off-by: Maximilian Marcoll <quince@maximilianmarcoll.de>
gui, dunno

Signed-off-by: Maximilian Marcoll <quince@maximilianmarcoll.de>
Implemented PositionGuides
(Also VolumeStandardContainer is now the default Container for Layers in new Strips)


Signed-off-by: Maximilian Marcoll <quince@maximilianmarcoll.de>
changes


Signed-off-by: Maximilian Marcoll <quince@maximilianmarcoll.de>