Many had already been fixed but weren't working on Mac because
of the DIALOG_SHIM hack (now fixed). Others hadn't been updated
yet. Also includes some cleanup for elipses in buttons and
layout.
Fixes: lp:1748506
* https://bugs.launchpad.net/kicad/+bug/1748506
Improve dialog layout and fix UI policy issues with all of the dialog
boxes in the common, 3D viewer, CvPcb, and Eeschema code paths.
Updated the use of component to symbol.