I decided to upgrade my server from Ubuntu 12.04 to 14.04 (switched the server) and suddenly I could not edit the variables column widths from the Studio Web Interface.
I read some blogs which said some possible problems on the compatibility of Sugar CRM and PHP5.5.
I did a test downloading and installing a new instance of the latest Sugar distribution on my new server (the one I currently have is 3 years old), to see if it was a compatibility between my old version and the new server, but the new version had the same problem.
So bypass the Studio console problem I was able to hard code the column width (In my case I was trying to adjunt the width of the Contact Subpanel inside the Accounts Module. This is the route.
Hope this helps and any collaboration to solve the main issue is appreciated.