Issue: [4.1 Beta 1] Protection Options 'explain' style tweak: change to option hint

On the "Protection Settings" page (route: index.php?wiki/&do=protect) div.formRow-explain is currently used to structure each of the radio choice explanations.

If you look at index.php?account/privacy, dfn.inputChoices-explain is used when an explanation line refers to a specific choice. Compared to div.formRow-explain, it has no top margin which helps to visually group the explanation with the choice option above that it refers to. I think this would be more appropriate for VW's protection option choice explanations.

If using the <xf:option> template element, simply move the explain phrase for each option into the hint parameter. Please see template helper_account for an example.

Or if creating this HTML directly, change div class .formRow-explain to .inputChoices-explain.