Make some changes to try to fix a common crash in setFastTimer when it's called from a notification when we become key

Fix bug where non-tmux tabs sometimes lost their autoresizing of subviews of SessionView (e.g., when there is a tmux tab around and you toggle the per-pane title)

Expand the criteria for character runs to be compatible, most notably including color (whose presence in the NSAttributedString is not carried through to drawing).

Fix issue 2479

Expand the criteria for character runs to be compatible, most notably including color (whose presence in the NSAttributedString is not carried through to drawing).