Blender Git Loki

Fix #20220: edge ring select confusing

* no longer a modal operator now, that was useful when it was part of
the loopcut macro but is no longer the case, and should have not
affected regular edge ring selection.
* don't fall through to loop select in face mode, that is bad 2.4
behavior, just use alt+rmb if you want to loop select.
* fix error number of cuts error print, missing select mode flush, and
use more accurate notifier.