Possible to get nk_combo (Combobox) "DropUp"?

It's possible to get nk_combo_begin_label (as example) get "drop up" beside default dropdown?
Example code:
```
if (nk_begin(&ctx, "StatusBar", nk_rect(0, height-80, width, 80), NK_WINDOW_NO_SCROLLBAR))
{
nk_layout_row_dynamic(&ctx, 30, 3);
nk_label(&ctx, g_GUIData.strPartsCount, NK_TEXT_LEFT);
nk_label(&ctx, g_GUIData.strParamsCount, NK_TEXT_LEFT);
static int selected_item = 0;
static const char *items[] = { "Item 0","item 1","item 2" };
if (nk_combo_begin_label(&ctx, items[selected_item], nk_vec2(nk_widget_width(&ctx), 35))) {
nk_layout_row_dynamic(&ctx, 35, 1);
for (int i = 0; i < 3; ++i)
if (nk_combo_item_label(&ctx, items[i], NK_TEXT_LEFT))
selected_item = i;
nk_combo_end(&ctx);
}
nk_end(&ctx);
}
```
On screenshot dropdown combobox. Can I set layout row upper uses absolute coordinates, it's possible?

Start at the nk_combo_begin_label and nk_combo_end entry points shown in the example, and compare their current behavior with the attached drop-up screenshot. Trace how the combo's popup position is selected and determine how an upper-opening option could coexist with the default dropdown. Done means the example can open the combobox upward when requested without breaking the existing behavior.

Written by the indexing model from the issue text.