Persistent selection filter UI for PcbNew
This MR adds a stateful selection filter with accompanying UI. The filter applies to selection using the mouse cursor (click or drag)
Notes:
- Save/restore of the filter state can be added to project local settings after !250 (merged) is merged
- The old "filter selection" dialog can still be used to refine an existing selection
Fixes #2241 (closed)
Fixes #4615 (closed)
I'm going to say this Fixes #2415 (closed) as it should make it a lot easier to avoid selecting things you don't want to.
Edited by Jon Evans