"Select All" should respect filters (Or add a new button that does)

[ZenithVal]

When organize shapekeys on a model with a very large list, being able to use "select all" with the current filtered list of shapekeys would save a lot of time compared to manually selecting every single one. Right now if you select all while filtering, it just selects all, even ones filtered by their name.

EG:
A model has a bunch of shapekeys and they already have prefixes for Mouth_, Eyes_, etc. If select all respected the current filter by name, these could be put into a neat folder in seconds.