successfully optimized performance of functions operating on selections of objects. the temp wrapper does no more contain copies of the objects but the objects themselves, so they don't have to be swapped anymore, no additional loading of the view, faster execution!

Signed-off-by: Maximilian Marcoll <quince@maximilianmarcoll.de>
EnvelopeContainer now supports alpha value in colors


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