Well, there’ll be more settings that I forgot to change in the next day or two, but the basic setup works.
#Gigolo,
#InputRemapper,
#CopyQ,
#VMG,
#KDEKate,
#DoubleCommander, and
#Vivaldi all installed and configured. Weird new quirk in Kate text editor, where the last display line on screen sometimes gets the bottom part of a line of text that scrolled by stuck to it. And the white line I use as a highlight doesn’t override or fix it, though flipping to another tab and back does. (And I can’t do a screenshot, because that redraws the screen and fixes it.) Same version of Kate.