Use hideif on the mod_assign settings form

Create a new assignment instance in a course On the assignment instance settings page update each of the following settings: Submission types: Online text "Word limit" should be shown when enabled + hidden when disabled Submission types: File submission "Maximum number of uploaded files", "Maximum submission size", "Accepted file types" should be shown when enabled + hidden when disabled Feedback types: Feedback comments "Comment inline" should be shown when enabled + hidden when disabled Submission settings: Attempts reopened "Maximum attempts" should be shown when 'Manually' or 'Until passing grade' selected, but hidden when 'Never' selected Grade: Use marking workflow "User marking allocation" should be shown when 'Yes' selected, but hidden when 'No' selected In all cases, the form should successfully submit