Issue 4906 (part I.) Move panel limit notification into separate module.
Issue 4906 (part II.) Share panel notification logic and CSS
Fixed parsing of "transparent" keyword and improved performance of color
keyword checking in Css.colorNameToRGB() (related to issue 6730)
Keep spaces after commas and brackets (related to issue 6730)
Removed dirty little semicolon after a condition (related to issue 6708)
Issue 4906 (part III.) Put net limit notification message at the very top
Issue 4906 (part IV.) Show notification in Script panel if tab cache is exceeded
Merge branch 'issue4906', remote-tracking branch 'origin'
Fix typos (related to issue 4906)
Merge remote-tracking branch 'origin/master' into issue6557_2

Conflicts:
	extension/content/firebug/js/tabCache.js
issue6557_2: Only get cache content when needed -- impacts ??? --