Add possibilty to select keyframes in Video Editor with mouse selection.

[Gabby16Bitbox]

Sometimes i need to re-arrange keyframe timing and right now you can only click on each keyframe hold shift from one point to the other and select them all. It would be nice to have a way to select them all with a mouse selection like every other NLE, it is faster.

I don't know why apple don't let you to move more keyframe tracks together, like the opacity track, toghether with transform track, i don't know if you can fix that because there is no way to select both keyframes toghether.

[latenitefilms]

I'm not sure if this is something possible for CommandPost to fix - but I'll have a look and a think at some point.