Tidy up "thermal_sonsors.widget.php" XHTML

Add CDATA section to SCRIPT tag
Move the STYLE block into the "all.css" theme files
Close INPUT tag
Remove name statement from DIV tag
Add summary statement to TABLE tag
Merge pull request #589 from ExolonDX/branch_25

Tidy up "thermal_sonsors.widget.php" XHTML