Minor fixes for RTL styles in 2.5 admin

[RanYanivHartstein]

The new RTL styles for the 2.5 contain a few minor inconsistencies and bugs. I've included a few patches to fix them. These were tested with Firefox on Windows. Note that to properly test RTL styles, actual RTL scripts should be used - these often trigger various browser bugs that won't show up when using the default locale. I would recommend using the Hebrew or Arabic locales

Some of the errors fixed:

• WP logo shown twice in footer
• Certain form fields that only receive LTR content are set to RTL
• Widgets in the dashboard are shown in the wrong order
• RSS feed isn't fully RTLed
• Fonts selected aren't usually available with glyphs for RTL scripts (Hebrew, Arabic, etc.)
• Post edit page is not fully RTLed
• Toggles on #poststuff boxes colide with the box
• Delete button on manage pages isn't fuly RTLed
• Path row in TinyMCE isn't RTLed

[RanYanivHartstein]

Patches for various minor RTL glitches in 2.5 admin

[ryan]

Some other RTL work is going on in #6296. Let me see what Mani's latest stuff looks like, and I'll try to both sets of patches merged together.

[ryan]

(In [7494]) RTL fixes from mani_monaj and RanYanivHartstein. see #6296 #6365

[ryan]

(In [7501]) RTL fixes from mani_monaj and RanYanivHartstein?. see #6296 #6365