VPE/BrowserSim patches for 4.1.1.alpha1

Aggregate pull-request for issues:
JBIDE-15294 - BrowserSim: blinking cursor and delays while running BrowserSim
JBIDE-15293 BrowserSim/CordovaSim: add logging callbacks to Eclipse
JBIDE-15165 CordovaSim does not warn users that it needs Safari to run