Custom CSS tweaks for Firefox v4.7.0

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

Changelog:

[userChrome.css]

• fixed typo in megabar_expanding_breakout_disabled_fx128-132.css file name
• ac_popup_result_font_size.css is now disabled by default

[Tabs]

• (tweak) default tabs > no tab line option
• (tweak) 'tab audio icon' option
• (tweak) 'tab audio icon colorized' option

[Toolbars]
(fix from 4.6.9v2) additional bookmarks toolbar when bookmarks are on navigation toolbar
(fix from 4.6.9v2) simulated add-on bar > extra toolbar when bookmarks are on navigation toolbar