end-meeting use "title" from Modal

bigbluebutton-html5/imports/ui/components/end-meeting-confirmation/component.jsx

@@ -41,13 +41,9 @@ class EndMeetingComponent extends React.PureComponent {
         className={styles.modal}
         onRequestClose={closeModal}
         hideBorder
+        title={intl.formatMessage(intlMessages.endMeetingTitle)}
       >
         <div className={styles.container}>
-          <div className={styles.header}>
-            <div className={styles.title}>
-              {intl.formatMessage(intlMessages.endMeetingTitle)}
-            </div>
-          </div>
           <div className={styles.description}>
             {intl.formatMessage(intlMessages.endMeetingDescription)}
           </div>

bigbluebutton-html5/imports/ui/components/modal/simple/styles.scss

@@ -30,6 +30,8 @@
   flex: 1;
   margin: 0;
   font-weight: 400;
+  font-size: var(--font-size-large);
+  text-align: center;
 }
 
 .dismiss {