we upgraded from MW 1.18.1 to MW 1.20.2 and are using the (standard) vector skin but the side panel of navigation/toolbox is not collapsible. I checked it with browsers on a Linux machine: FireFox 17.0, Opera 12.11, Google Chrome Version 23.0.1271.97
- they do not collapse the left side bar div#mw-panel element
Is this phenomena known? (I found no related filed bugs)
Can this be solved? Thank you.