Fix: Loading icon is on the screen forever when leaving the app after sharing a file

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

@@ -709,6 +709,9 @@ OnSslUntrustedCertListener, EditNameDialogListener {
             unregisterReceiver(mDownloadFinishReceiver);
             mDownloadFinishReceiver = null;
         }
+        
+        dismissLoadingDialog();
+        
         Log_OC.d(TAG, "onPause() end");
     }