Sidebar modifications 

Sidebar modifications - source of code: https://github.com/DavisNT/CodeSamples/blob/master/MediaWiki%20hacks/Disable%20Collapsible%20Sidebar%20on%20MW%201.23.php - requested by Tyreek (IRC)
Update LocalExtensions.php
Update LocalExtensions.php
Merge pull request #277 from Southparkfan/patch-15

Sidebar modifications