Make scrollbar margins affect minimum size

Author: sockeye-d

scene/gui/scroll_container.cpp

@@ -61,15 +61,15 @@ Size2 ScrollContainer::get_minimum_size() const {
 		min_size.x = largest_child_min_size.x;
 		bool v_scroll_show = vertical_scroll_mode == SCROLL_MODE_SHOW_ALWAYS || vertical_scroll_mode == SCROLL_MODE_RESERVE || (vertical_scroll_mode == SCROLL_MODE_AUTO && largest_child_min_size.y > size.y);
 		if (v_scroll_show && v_scroll->get_parent() == this) {
-			min_size.x += v_scroll->get_minimum_size().x;
+			min_size.x += v_scroll->get_minimum_size().x + theme_cache.scrollbar_h_separation;
 		}
 	}
 
 	if (vertical_scroll_mode == SCROLL_MODE_DISABLED) {
 		min_size.y = largest_child_min_size.y;
 		bool h_scroll_show = horizontal_scroll_mode == SCROLL_MODE_SHOW_ALWAYS || horizontal_scroll_mode == SCROLL_MODE_RESERVE || (horizontal_scroll_mode == SCROLL_MODE_AUTO && largest_child_min_size.x > size.x);
 		if (h_scroll_show && h_scroll->get_parent() == this) {
-			min_size.y += h_scroll->get_minimum_size().y;
+			min_size.y += h_scroll->get_minimum_size().y + theme_cache.scrollbar_v_separation;
 		}
 	}