PLT-4233 When internet reconnects, reconnect websocket and grab latest posts, etc. (#4500)

* When internet reconnects, reconnect websocket and grab latest posts, etc.

* Rename internet connection variable

webapp/actions/websocket_actions.jsx

@@ -67,12 +67,13 @@ export function close() {
     WebSocketClient.close();
 }
 
-export function getStatuses() {
-    StatusActions.loadStatusesForChannelAndSidebar();
+export function reconnect() {
+    close();
+    initialize();
+    handleReconnect();
 }
 
 function handleFirstConnect() {
-    getStatuses();
     ErrorStore.clearLastError();
     ErrorStore.emitChange();
 }
@@ -83,7 +84,7 @@ function handleReconnect() {
         loadPosts(ChannelStore.getCurrentId());
     }
 
-    getStatuses();
+    StatusActions.loadStatusesForChannelAndSidebar();
     ErrorStore.clearLastError();
     ErrorStore.emitChange();
 }