Revert "added new radio unselect support for grids and tables, #351"

This reverts commit 5e5bf046859881fb70f14ddbd1cec6a4cb91678f.
resolved conflicts after cherry-picking from robust_radio_unselect branch
resolved conflict
cleanup and rebuilt
no hover on table column headings, closes #396
cleaned up the tests a bit
fixed style-exception issue with using latest jQuery in unit tests
added support for relevant on calculated items, closes #358
test confirming that readonly widgets include default values, closes #292
rebuilt
enable file uploads
rebuilt
reorganized submission
swapped Ghanaian symbol with rowo's new icon!
cross browser font compatibility and avoiding issue when OpenSans font installed locally, closes #397
corrected fonts of previous commit to version for all languages
replaced (fav)icons, added apple-touch-icons
removed .eot font (not required, since we don't support IE8 and lower)
rebuilt css
corrected paths to fonts….