some refactor on how layouts are loaded from server and populate the layouts combo box; fixed the "add layout" button that was not working since last modifications on the module;

Implemented the minWidth property in the layouts; it is defined in the window definition and is expressed in pixels:

<layout name="Something">
    <window name="VideoDock" width=... minWidth="400" />
</layout>

The other windows will adjust their size and position to fit the canvas according the windows with fixed minimum width. minHeight was not implemented yet.

The problem occured because the event to populate the list was sent
before the creation of combobox.

when the user saves the layout, the output file shouldn't present the <layout-block> tag - this is just internal to exchange layouts among the participants

 - tagging version 0.8

fixing the issue reported by a community member on this post: https://groups.google.com/forum/#!msg/bigbluebutton-dev/WgqfuXgPolE/YBAqw7kc0PoJ

implemented multiple definitions layout, so the admin may define specific layouts depending on the role of the participant (see the layout definition)

start to develop an order manager, which would keep track of the z-order of the windows in the canvas

 - update version to 0.8

making components consistent with the user's role: if the user is a participant, he won't see the control buttons (add, save, load), the lock button will be always disabled and the layouts combo will be enable only when the layouts aren't locked

added an attribute to the layout module to show or hide the module control buttons (add, save and load)

it still needs some refactoring, but it's working fine; this is the client side of the layout module which interacts with the server in order to (un)lock the windows layout

first version of the server side layout module - it allows users to lock and unlock the current layout; the layout is defined as a String, which should be a XML String but may be anything, this way is much easy to extend the layout management, since it won't need to change the server code

added missing german locale strings

Fix Latvian language file

final version of the layout module before start to implement the mechanism to lock the windows layout

Assigned a default blank password for mobile connection, as suggested by Felipe in http://code.google.com/p/bigbluebutton/issues/detail?id=1183