Set Refresh On Change Option as default refresh option for Preview Editor and HTML Preview
JBIDE-18318 Changes done on Source/Visual Tab are not visible after switching to Preview Tab

fixed
JBIDE-18302 VPV does not stick on currently selected widget

Fixing # issue for VPE in common case
JBIDE-18302 VPV does not stick on currently selected widget

incorrect working of getUrl() method fixed for Mac