Changes

*Fixed:**{{bug|576026}} - runtests.py.in is an interpolated file and shouldn't be

*Waiting for CheckinCheck-in:**{{bug|423401}} - Please use a local variable and copy the string once.

*Waiting for approval:**{{bug|602758}} - Fix "a the" in comments (in Toolkit)

*Waiting Review:**{{bug|594744}} - Update cache preferences from bug 559942.

*Working on:**{{bug|612030}} - follow-up to removal of region.dtd**{{bug|601562}} - Update Modern theme from missingPlugin.css to pluginProblem.css

*Investigating:**{{bug|573538}} - No options for Safe-Mode