Post format UI refresh.

* Post format switcher does not go away after clicking
* Refresh of format switcher style
* Highlighting of active post format
* Prompt text goes under the switcher
* Better animations

see #24046. props wonderboymusic, johnjamesjacoby, aaroncampbell, PeteMall.

Also, because I forgot it on [24006]: props saracannon.

git-svn-id: http://core.svn.wordpress.org/trunk@24098 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unused variable and CSS class. see #24046.

git-svn-id: http://core.svn.wordpress.org/trunk@24099 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.6-beta1-24100.

git-svn-id: http://core.svn.wordpress.org/trunk@24100 1a063a9b-81f0-0310-95a4-ce76da25c4cd
POT, generated from r24100

git-svn-id: http://core.svn.wordpress.org/trunk@24101 1a063a9b-81f0-0310-95a4-ce76da25c4cd
POT, generated from r24100

git-svn-id: http://core.svn.wordpress.org/trunk@24102 1a063a9b-81f0-0310-95a4-ce76da25c4cd
POT, generated from r24100

git-svn-id: http://core.svn.wordpress.org/trunk@24107 1a063a9b-81f0-0310-95a4-ce76da25c4cd
POT, generated from r24100

git-svn-id: http://core.svn.wordpress.org/trunk@24109 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix the appearance of a blank media item due to [23893].

props kovshenin. fixes #24094.

git-svn-id: http://core.svn.wordpress.org/trunk@24110 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix display of post format icons and post titles in IE7. props kovshenin. fixes #24120.

git-svn-id: http://core.svn.wordpress.org/trunk@24111 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove excess margin on the menus accordion in IE7. props bobbravo2. fixes #24095.

git-svn-id: http://core.svn.wordpress.org/trunk@24112 1a063a9b-81f0-0310-95a4-ce76da25c4cd