Allow role modal has unstyled buttons

Test in Boost and Classic As a teacher, in your course, in an activity, select "Permissions" On a capability, click the + icon under the " Roles with permission " column. Verify the buttons are properly styled and look consistent with Moodle's secondary buttons. Click the + icon in any row under the " Prohibited " column. Confirm that the buttons also look properly styled. Note: You might encounter the error " Cannot read property 'filter' of undefined ". Ignore this as it will be fixed in MDL-64523 .