Fix ups needed for RTL

[philwareham]

List of formatting issues that need fixing in RTL languages:

• [x] Resizable - resize handle on wrong edge
• [x] Drop down selectmenus on controlgroup - alignment of menu box needs to be reversed
• [x] Sortable - flip the padding of inner items
• [x] Menu - alignment of submenus is broken
• [x] Controlbox - selectmenu button border radius glitched when last/first item
• [x] Dialog box - alignment of header and button area needs to be reversed
• [x] Select tags - icon needs to swap to left side
• [x] Mockups - List article RTL currently isn't RTL, oops

[philwareham]

Resizable issue is a bug in jQuery UI which will be fixed when they do API rewrite. Closing.