Merge pull request #166 from quiaro/2.3.x

Upgrades TinyMCE to version 3.5.10 and changes polling interval for session timeout
v2.3.2 Release
prepare for next development iteration
CRAFTERCMS-516: Site Dropdown right-click controls become disabled

'Static assets' and 'Templates' were sharing the same context menu.
Adds separate context menus for these two sections.