Custom CSS tweaks for Firefox v4.5.1

Full changelog: https://github.com/Aris-t2/CustomCSSforFx/commits/

Changelog:

[General UI]

• (tweak) close icon settings

[Tabs]

• (fix) lwthemes + tabs below navigation toolbar

[Toolbars]

• (fix) lwthemes + menubar > menubar colors

[Location Bar]

• (tweak) mega bar popup> 'title and url' share ~50% of popups width
• (tweak) mega bar popup > 'url and title' share ~50% of popups width

[about:preferences]

• (new) hide "Firefox Support" item

v2
[Toolbars]

• (fix) menubar > menubar colors