GSoC Week 9: Performance analysis and couple of fixes

#phpMyAdmin, #gsoc15

Tasks done

Show form group header properly in settings page
Issue #1813, Delete rows using "Check All" is broken

Note about performance analysis

I carried out further performance analysis for page-related settings by profiling performance with xdebug. The function call to PMA_userprefsPageInit() takes most of the time. I couldn't see any way to reduce this time, though.