Show unread mode

Source code organized with new rules
Renamed methods: While the Realm mapping it 1-to-1, the method name can be anything. Let's use it

app/src/main/java/chat/rocket/android/RocketChatApplication.java

@@ -36,6 +36,6 @@ public class RocketChatApplication extends MultiDexApplication {
 
     InstabugWrapper.build(this, getString(R.string.instabug_api_key));
 
-    //TODO: add periodic trigger for RocketChatService.keepalive(this) here!
+    //TODO: add periodic trigger for RocketChatService.keepAlive(this) here!
   }
 }

app/src/main/java/chat/rocket/android/service/RocketChatService.java

@@ -71,7 +71,7 @@ public class RocketChatService extends Service {
       if (webSocketThreads.containsKey(serverConfigId)) {
         RocketChatWebSocketThread thread = webSocketThreads.get(serverConfigId);
         if (thread != null) {
-          thread.keepalive();
+          thread.keepAlive();
         }
       }
     }
@@ -110,7 +110,7 @@ public class RocketChatService extends Service {
         .onSuccessTask(task -> {
           RocketChatWebSocketThread thread = task.getResult();
           if (thread != null) {
-            thread.keepalive();
+            thread.keepAlive();
           }
           return ServerConfig.updateState(serverConfigId, ServerConfig.STATE_CONNECTED);
         }).continueWith(new LogcatIfError());

app/src/main/res/values/strings.xml

@@ -33,4 +33,5 @@
     <string name="add_server_activity_waiting_server">Connecting to server…</string>
     <string name="server_config_activity_authenticating">Authenticating…</string>
     <string name="home_fragment_title">Rocket.Chat - Home</string>
+    <string name="fragment_sidebar_main_unread_rooms_title">UNREAD ROOMS</string>
 </resources>