PLT-5118 moving to last_picture_update for the profile img (#4985)

webapp/components/suggestion/at_mention_provider.jsx

@@ -70,7 +70,7 @@ class AtMentionSuggestion extends Suggestion {
             icon = (
                 <img
                     className='mention__image'
-                    src={Client.getUsersRoute() + '/' + user.id + '/image?time=' + user.update_at}
+                    src={Client.getUsersRoute() + '/' + user.id + '/image?time=' + user.last_picture_update}
                 />
             );
         }

webapp/components/suggestion/search_user_provider.jsx

@@ -41,7 +41,7 @@ class SearchUserSuggestion extends Suggestion {
                 <i className='fa fa fa-plus-square'/>
                 <img
                     className='profile-img rounded'
-                    src={Client.getUsersRoute() + '/' + item.id + '/image?time=' + item.update_at}
+                    src={Client.getUsersRoute() + '/' + item.id + '/image?time=' + item.last_picture_update}
                 />
                 <div className='mention--align'>
                     <span>

webapp/components/suggestion/switch_channel_provider.jsx

@@ -35,7 +35,7 @@ class SwitchChannelSuggestion extends Suggestion {
                 <div className='pull-left'>
                     <img
                         className='mention__image'
-                        src={Client.getUsersRoute() + '/' + item.id + '/image?time=' + item.update_at}
+                        src={Client.getUsersRoute() + '/' + item.id + '/image?time=' + item.last_picture_update}
                     />
                 </div>
             );