JBIDE-13625 BrowserSim: Browsersim closes unexpectively when
closing Firebug Lite

- added a workaround for Mac
JBIDE-13525 BrowserSim: add syncronized windows

functionality added, open in new window functionality removed
JBIDE-13525 BrowserSim: add syncronized windows

fix for context menu in Mac Os for sync window
small code refactoring
JBIDE-13525 merge: BrowserSim: add syncronized windows
JBIDE-13624 BrowserSim: source code refactoring

refactoring