Removed call to FlushPendingNotifications() in SetCaretEnabled()
because it causes a reflow during painting. That can cause certain
view updates to be dropped on the floor on Linux. Also removed
tab characters in SetCaretEnabled().
r=sfraser@netscape.com, a=beppe@netscape.com
git-svn-id: svn://10.0.0.236/trunk@72378 18797224-902f-48f8-a5cc-f745e15eee43