mootools change break context menu

Fx.Tween in mootols 1.4.5  no longer sets visibility to hidden, so when the context menu dissapear, if you put the mouse in the space where the menu were showed is still there but with opacity to 0 and cannot click to nothing below that area

So i emulated the old behaviour with OnComplete event.

Additionally i changed the use of deprecated $empty
Show utorrent compatible peer flags. Implements issue #531.
Store TorrentTempData only in memory. Partially implements #583.
Add constness and value by reference in TorrentTempData.
Fixed a couple of Italians strings.
Add missing break statement in proxy code
Fix peer flags.
Merge pull request #662 from micheleolivo/master

Italians strings fixed
Merge pull request #629 from sledgehammer999/temp_tor_data

Store TorrentTempData only in memory. Partially implements #583.
Merge pull request #606 from sledgehammer999/peer_tab

Show utorrent compatible peer flags. Implements issue #531.
Merge pull request #594 from ccerrillo/master

changes in mootools breaks the context menu