LiveAdmin 1.3.1

[liveadmin]

- Added new popup theme. This theme opens a new window like a popup.
- Added new Vista theme.

- Bug fixed, sometimes admin panel logged out all by itself without any reason.
- Bug fixed, On Internet Explorer, some themes did not work properly on some pages without a proper DOCTYPE tag.
- Bug fixed, on some very old browsers chat client (all themes) did not work properly. On such browsers LiveAdmin will switch to 'popup basic' theme.
- Bug fixed, some minor issues on News system.