QA fixes

app/src/main/java/chat/rocket/android/fragment/sidebar/SidebarMainPresenter.java

@@ -3,7 +3,6 @@ package chat.rocket.android.fragment.sidebar;
 import android.support.annotation.NonNull;
 import android.support.v4.util.Pair;
 
-import com.fernandocejas.arrow.optional.Optional;
 import io.reactivex.Flowable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.Disposable;

app/src/main/java/chat/rocket/android/fragment/sidebar/dialog/AddDirectMessageDialogFragment.java

@@ -28,6 +28,9 @@ import chat.rocket.persistence.realm.repositories.RealmUserRepository;
  * add Direct RealmMessage.
  */
 public class AddDirectMessageDialogFragment extends AbstractAddRoomDialogFragment {
+
+  private CompositeDisposable compositeDisposable = new CompositeDisposable();
+
   public static AddDirectMessageDialogFragment create(String hostname) {
     Bundle args = new Bundle();
     args.putString("hostname", hostname);
@@ -37,8 +40,6 @@ public class AddDirectMessageDialogFragment extends AbstractAddRoomDialogFragmen
     return fragment;
   }
 
-  private CompositeDisposable compositeDisposable = new CompositeDisposable();
-
   @Override
   protected int getLayout() {
     return R.layout.dialog_add_direct_message;