Temporarily fix directory tile heights in grid mode.

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:layout_height="wrap_content"

    android:layout_margin="@dimen/grid_item_margin"

    android:background="@color/item_doc_background"

    android:elevation="5dp"