Gravity Perks - Limit Choices 1.7.13

Fixed issue on Gravity Flow Detail page where exhausted choices were not displayed even when selected.
Fixed issue where some 3rd party add-ons call gform_pre_render twice which can result in double-processing of choices.
Updated GP_Bootstrap to v1.2.

• Fixed issue where Product fields with values containing special characters were not counted towards the limit correctly.
• Updated how Product field values are sanitized.

• Fixed issue where validation was not re-executed on final form submission for multi-page forms.