Adds Chrome Cloud Sync
Some small fix for Chrome Sync Feature
Sets Chrome Sync to Debug Only
Adds Upgrade Tag for Highlighter
Adds GUI stub for new Highlighter Menu
Adds "image" Field for Filter && refactoring
Adds Key to Manifest file to allow test of Sync.
Fixes problem with Sync
Minor tweaks
Sets "Chrome Sync" to public.

The Sync between two devices worked fine.
Implements new Highlighter Menu
Adds GUI for priority System
Priority System & disable_default_coloring
Updates Unit-Test