added missing progressbar

res/layout/files_folder_picker.xml

@@ -22,6 +22,18 @@
     android:background="@color/background_color"
     android:orientation="vertical" >
 
+    <ProgressBar android:id="@+id/progressBar"
+        android:layout_width="match_parent"
+        android:layout_height="4dp"
+        android:padding="0dp"
+        android:layout_margin="0dp"
+        style="@style/Widget.ownCloud.TopProgressBar"
+        android:indeterminate="false"
+        android:indeterminateOnly="false"
+        android:background="@color/background_color"
+        android:visibility="visible"
+        />
+
 	<FrameLayout 
 		android:layout_width="match_parent"
 		android:layout_height="0dip"