Hotfix for collapsing last mailbox in a level
[mms] Improved handling for multiple expand/collapse actions in the dynamic folder list (Bug #13170).
Abstract editor code into single JS object, to better deal with ckeditor quirks
signature_show_compose is not an identity pref, so we can't/shouldn't display it there
Clean up RTELoading()
We need to resize in the IE bug case
Resize loading overlay