Fix Clicking back button on new login view relaunches the URL input form

src/com/owncloud/android/ui/activity/BaseActivity.java

@@ -257,7 +257,7 @@ public void run(AccountManagerFuture<Bundle> future) {
                 Log_OC.e(TAG, "Account creation callback with null bundle");
             }
             if (mMandatoryCreation && !accountWasSet) {
-                moveTaskToBack(true);
+                finish();
             }
         }
     }