windows. Rationale: better visual results (surprisingly), and better
portability (hopefully).
* restore window state when showing window
* help cursor only on pref window
Globally we're at the same stage we were before wanting to drop X11 and Gecko
window-cooking (f1789077), but with a much more robust/modular/cleaner design.
Hopefully.
* merge server_types and excluded_accounts into one mail_accounts pref
This is visually more intuitive. So do we use the same tree for both. But we
store them into 2 different "branches" of the corresponding preference
object. We need to keep track of them separately because of account
creation/deletion.
xpcom-shutdown for closing libs !)
* icon handling moved to MoztIconLinux.jsm
* tray icon changes (icon+tooltip) according to unreadMsgCount
* strings (localization) provided by commons.js
from windows. Pros: reads much simpler. Cons: unnecessary eventListeners (but
not harmful either).
* experimental kb shortcut for hiding all windows (whatever the value of
'close_hises')
* bumped to version 8.* (FF, TB)
