Use the vertical scrollbar when calculating the width that can be used for drawing

The horizontal scrollbar was used before, which is not correct as it has no influence to the drawing width
Also fixed the other wrong locations

scene/gui/tree.cpp

@@ -2580,8 +2580,8 @@ void Tree::_range_click_timeout() {
 		mb.instantiate();
 
 		int x_limit = get_size().width - theme_cache.panel_style->get_minimum_size().width;
-		if (h_scroll->is_visible()) {
-			x_limit -= h_scroll->get_minimum_size().width;
+		if (v_scroll->is_visible()) {
+			x_limit -= v_scroll->get_minimum_size().width;
 		}
 
 		cache.rtl = is_layout_rtl();
@@ -3640,8 +3640,8 @@ void Tree::gui_input(const Ref<InputEvent> &p_event) {
 				propagate_mouse_activated = false;
 
 				int x_limit = get_size().width - theme_cache.panel_style->get_minimum_size().width;
-				if (h_scroll->is_visible()) {
-					x_limit -= h_scroll->get_minimum_size().width;
+				if (v_scroll->is_visible()) {
+					x_limit -= v_scroll->get_minimum_size().width;
 				}
 
 				cache.rtl = is_layout_rtl();
@@ -4015,8 +4015,8 @@ void Tree::_notification(int p_what) {
 			Point2 draw_ofs;
 			draw_ofs += bg->get_offset();
 			Size2 draw_size = get_size() - bg->get_minimum_size();
-			if (h_scroll->is_visible()) {
-				draw_size.width -= h_scroll->get_minimum_size().width;
+			if (v_scroll->is_visible()) {
+				draw_size.width -= v_scroll->get_minimum_size().width;
 			}
 
 			bg->draw(ci, Rect2(Point2(), get_size()));