Ui ifxes (#5890)

* PLT-5975 - Back arrow in flag list cutting off

* PLT-6049 - Fixing pin icon color, and hover state

* PLT-5989 - Channel member and pin icon issue

* PLT-6067 - Pinned icon misaligned in firefox

* PLT-5885 - Adjusting icon spacing in modal

webapp/components/integrations/components/delete_integration.jsx

@@ -25,7 +25,7 @@ export default class DeleteIntegration extends DeleteModalTrigger {
     get modalMessage() {
         return (
             <div className='alert alert-warning'>
-                <i className='fa fa-warning'/>
+                <i className='fa fa-warning fa-margin--right'/>
                 <FormattedMessage
                     id={this.props.messageId}
                     defaultMessage='This action permanently deletes the integration and breaks any integrations using it. Are you sure you want to delete it?'