SystemUI: advanced reboot: set maxElementsWrap

        Resources res = context.getResources();

        int nElementsWrap = res.getInteger(

                com.android.systemui.R.integer.power_menu_lite_max_columns);

        int nChildren = listView.getChildCount() - 1; // don't count flow element

        // Avoid having just one action on the last row if there are more than 2 columns because

        // it looks unbalanced. Instead, bring the column size down to balance better.

        if (nChildren == nElementsWrap + 1 && nElementsWrap > 2) {

            nElementsWrap -= 1;

        }

        flow.setMaxElementsWrap(nElementsWrap);

        Dialog dialog = new Dialog(context);

        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);

        dialog.setContentView(listView);