Bug972573, The selection screen for adding a contact with multiple phone...

... numbers to a SMS message lacks a cancel, back, or 'x' button

Change from ValueSelector to ActionMenu

https://bugzilla.mozilla.org/show_bug.cgi?id=972573
If we want to clear all the data from the list container I propose to use `listContaner.innerHTML = ''` since it's way faster and much simpler (1 LOC instead of 3 is a win). Proper performance test ([link](http://jsperf.com/removeallchildnodes)): 
![screen shot 2014-06-11 at 11 52 03](https://cloud.githubusercontent.com/assets/347657/3242666/1ec9d18a-f14e-11e3-9388-090104ffceec.png)