PLT-7318 fixing focus issue with IPad (#7287)

* PLT-7318 fixing focus issue with IPad

* Fixing for RHS

webapp/components/create_comment/create_comment.jsx

@@ -455,7 +455,7 @@ export default class CreateComment extends React.Component {
     }
 
     focusTextbox = (keepFocus = false) => {
-        if (keepFocus || !Utils.isMobile()) {
+        if (keepFocus || !UserAgent.isMobile()) {
             this.refs.textbox.focus();
         }
     }

webapp/components/create_post.jsx

@@ -302,7 +302,7 @@ export default class CreatePost extends React.Component {
     }
 
     focusTextbox(keepFocus = false) {
-        if (keepFocus || !Utils.isMobile()) {
+        if (keepFocus || !UserAgent.isMobile()) {
             this.refs.textbox.focus();
         }
     }

webapp/utils/user_agent.jsx

@@ -64,7 +64,7 @@ export function isIosWeb() {
 }
 
 export function isIos() {
-    return userAgent.indexOf('iPhone') !== -1;
+    return userAgent.indexOf('iPhone') !== -1 || userAgent.indexOf('iPad') !== -1;
 }
 
 export function isAndroid() {