FIX REGRESSION In Cpanel modules widths due to buggy sample data set

https://github.com/joomla/joomla-cms/pull/2206/files#diff-8fb2f5a83bfb0c557be664644876f1adL102

has fixed @brianteeman has only fixed this regression bug for new sites. This fixes it for upgraded sites too.

Needs a test as I did this on github to help, without time to test right now.