Perform payment button UI changes on main thread
Perform payment button UI changes on main thread

braintree/braintree_ios,braintree/braintree_ios,Feverup/braintree_ios,apascual/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,apascual/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,apascual/braintree_ios,apascual/braintree_ios,billCTG/braintree_ios,Feverup/braintree_ios,braintree/braintree_ios,Feverup/braintree_ios,Feverup/braintree_ios