Fix tooltip appearing in old place, on movement

Fixes tooltip appearing in editor on old position of mouse.
Fixes tooltip appearing even if mouse is in steady motion (now accepts max 5 px movement).

scene/main/viewport.cpp

@@ -1931,21 +1931,19 @@ void Viewport::_gui_input_event(Ref<InputEvent> p_event) {
 					}
 				}
 
-				// If the tooltip timer isn't running, start it.
-				// Otherwise, only reset the timer if the mouse has moved more than 5 pixels.
-				if (!is_tooltip_shown && over->can_process() &&
-						(gui.tooltip_timer.is_null() ||
-								Math::is_zero_approx(gui.tooltip_timer->get_time_left()) ||
-								mm->get_relative().length() > 5.0)) {
-					if (gui.tooltip_timer.is_valid()) {
-						gui.tooltip_timer->release_connections();
-						gui.tooltip_timer = Ref<SceneTreeTimer>();
+				// Reset the timer if the mouse has moved more than 5 pixels or has entered a new control.
+				if (!is_tooltip_shown && over->can_process()) {
+					Vector2 new_tooltip_pos = over->get_screen_transform().xform(pos);
+					if (gui.tooltip_pos.distance_squared_to(new_tooltip_pos) > 25 || over != gui.tooltip_control) {
+						if (gui.tooltip_timer.is_valid()) {
+							gui.tooltip_timer->release_connections();
+						}
+						gui.tooltip_control = over;
+						gui.tooltip_pos = new_tooltip_pos;
+						gui.tooltip_timer = get_tree()->create_timer(gui.tooltip_delay);
+						gui.tooltip_timer->set_ignore_time_scale(true);
+						gui.tooltip_timer->connect("timeout", callable_mp(this, &Viewport::_gui_show_tooltip));
 					}
-					gui.tooltip_control = over;
-					gui.tooltip_pos = over->get_screen_transform().xform(pos);
-					gui.tooltip_timer = get_tree()->create_timer(gui.tooltip_delay);
-					gui.tooltip_timer->set_ignore_time_scale(true);
-					gui.tooltip_timer->connect("timeout", callable_mp(this, &Viewport::_gui_show_tooltip));
 				}
 			}