Primary change is to replace most control/window borders with
AUI pane borders. We implement our own AUI border drawing
routine which avoids the ugly one-pixel white frames around
dark canvasses.
Also increases the signal-to-noise ratio of all the pane
creation code in the various frames.
Spooling up a full PLAYER in the background takes too long.
This also fixes bugs around how the tables are saved, although
that was just missing code rather than anything architectural.
Fixes: lp:1785436
* https://bugs.launchpad.net/kicad/+bug/1785436
Unifies the different sections of hotkeys so that we are not storing two
[eeschema] or [pcbnew] sections in two different files.
Previous hotkey definitions are loaded at start if they exist but are
overwritten by the new format, if it exists. Changes to hotkeys save
only in the combined format.
Hotkey editor for each application only shows the hotkeys relevant to
that application.
Fixes: lp:1741757
* https://bugs.launchpad.net/kicad/+bug/1741757
Fixes: lp:1668799
* https://bugs.launchpad.net/kicad/+bug/1668799