Bugfixes and changed command 

The following is included:

1. Included cstyan's fixes for mountbutton issue #17 and #18. 
2. Changed command to enable/disable actionbar tooltip at cursor to match other commands (/vui actiontooltip 1)(/vui actiontooltip 0)
3. Fixed overdrawing popup windows. See screenshots: 
Not fixed for RecallFrame yet
![overdraw issue](https://cloud.githubusercontent.com/assets/7889925/3419243/aeede8a6-fe59-11e3-89b6-74cfea942fb5.png)
![overdraw fix for actionbarframe](https://cloud.githubusercontent.com/assets/7889925/3419245/b93106c2-fe59-11e3-84c3-4ad20c3a2832.png)