Latest Changes

   I've just pushed some changes to git.  Please test.

   Philip has made a number of improvements as a result of running 
cppcheck.  Some general regression testing would be helpful here.

   I've redesigned the code for looping, both Classic and Advanced.  If 
you are a loop user, please test both.  The behavior should be exactly 
as before.  You will find the setting in the preferences: Advanced 
Looping (experimental).  (I should probably bump that to beta as we will 
be making it official and possibly the default for the 23.06 release.)

   Key addition to Advanced Looping is indicators on the loop ruler for 
LoopOff, LoopOn, and LoopAll.  I've gone with a black/white/blue color 
scheme to accommodate color blindness.  We could also do crosshatching 
for LoopAll mode to eliminate the need for color altogether.  Input from 
color blind users would be appreciated here.  E.g. is the LoopAll dark 
blue background bright enough?

   Give it a whirl and let me know how it goes.

Thanks.
Ted.