Do not show rich workspace when "on devices"

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

src/main/java/com/owncloud/android/ui/adapter/OCFileListAdapter.java

@@ -56,6 +56,7 @@ import com.elyeproj.loaderviewlibrary.LoaderImageView;
 import com.nextcloud.client.account.User;
 import com.nextcloud.client.account.UserAccountManager;
 import com.nextcloud.client.preferences.AppPreferences;
+import com.owncloud.android.MainApp;
 import com.owncloud.android.R;
 import com.owncloud.android.datamodel.FileDataStorageManager;
 import com.owncloud.android.datamodel.OCFile;
@@ -825,6 +826,10 @@ public class OCFileListAdapter extends RecyclerView.Adapter<RecyclerView.ViewHol
             return false;
         }
 
+        if (MainApp.isOnlyOnDevice()) {
+            return false;
+        }
+
         return !TextUtils.isEmpty(currentDirectory.getRichWorkspace());
     }