Gravity Perks - Limit Checkboxes 1.3.16

Download Gravity Perks - Limit Checkboxes 1.3.16 from nulled fire. Limit how many checkboxes can be checked.
Added new GPLimitCheckboxes.getCheckboxCheckedCount() and GPLimitCheckboxes.isGroupBelowMin() JavaScript methods.
Added new gplc_excluded_input_selectors JavaScript filter hook.