### Godot version

v4.0.beta10.official [d0398f62f]

### System information

Windows 11

### Issue description

When hovering over the `MenuBar` items - the hover state activates only once (on first hover).

As demonstrated in this video - Debug menu toggles to hover visual style only once:


https://user-images.githubusercontent.com/433527/209774611-a3d6d80b-deb2-466b-b39d-bb480a5ade17.mp4

### Steps to reproduce

See video, try the same in Godot editor.

### Minimal reproduction project

N/A
Control::_update_theme_item_cache();
	theme_cache.normal = get_theme_stylebox(SNAME("normal"));
	theme_cache.normal_mirrored = get_theme_stylebox(SNAME("normal_mirrored"));
	theme_cache.disabled = get_theme_stylebox(SNAME("disabled"));
	theme_cache.disabled_mirrored = get_theme_stylebox(SNAME("disabled_mirrored"));
	theme_cache.pressed = get_theme_stylebox(SNAME("pressed"));
	theme_cache.pressed_mirrored = get_theme_stylebox(SNAME("pressed_mirrored"));
	theme_cache.hover = get_theme_stylebox(SNAME("hover"));
	theme_cache.hover_mirrored = get_theme_stylebox(SNAME("hover_mirrored"));
	theme_cache.hover_pressed = get_theme_stylebox(SNAME("hover_pressed"));
	theme_cache.hover_pressed_mirrored = get_theme_stylebox(SNAME("hover_pressed_mirrored"));
	theme_cache.font = get_theme_font(SNAME("font"));
	theme_cache.font_size = get_theme_font_size(SNAME("font_size"));
	theme_cache.outline_size = get_theme_constant(SNAME("outline_size"));
	theme_cache.font_outline_color = get_theme_color(SNAME("font_outline_color"));
	theme_cache.font_color = get_theme_color(SNAME("font_color"));
	theme_cache.font_disabled_color = get_theme_color(SNAME("font_disabled_color"));
	theme_cache.font_pressed_color = get_theme_color(SNAME("font_pressed_color"));
	theme_cache.font_hover_color = get_theme_color(SNAME("font_hover_color"));
	theme_cache.font_hover_pressed_color = get_theme_color(SNAME("font_hover_pressed_color"));
	theme_cache.font_focus_color = get_theme_color(SNAME("font_focus_color"));
	theme_cache.h_separation = get_theme_constant(SNAME("h_separation"));
}
void MenuBar::_notification(int p_what) {