LibGUI+WindowServer: Tweak hover shadows slightly

Move the shadow 1 more pixel away from the unhovered icon location,
making a total 2 pixel distance between the icon and the shadow.
Also tweak the shadow color to be a darkened variant of the base color
underneath the icon.

Libraries/LibGUI/Button.cpp

@@ -65,8 +65,8 @@ void Button::paint_event(PaintEvent& event)
     if (is_being_pressed() || is_checked())
         painter.translate(1, 1);
     else if (m_icon && is_enabled() && is_hovered() && button_style() == Gfx::ButtonStyle::CoolBar) {
-        auto shadow_color = palette().threed_shadow1();
-        painter.blit_filtered(icon_location, *m_icon, m_icon->rect(), [&shadow_color](auto) {
+        auto shadow_color = palette().button().darkened(0.7f);
+        painter.blit_filtered(icon_location.translated(1, 1), *m_icon, m_icon->rect(), [&shadow_color](auto) {
             return shadow_color;
         });
         icon_location.move_by(-1, -1);

Services/WindowServer/Menu.cpp

@@ -248,9 +248,8 @@ void Menu::draw()
                 icon_rect.center_vertically_within(text_rect);
 
                 if (&item == hovered_item() && item.is_enabled()) {
-                    auto shadow_color = palette.threed_shadow1();
-                    shadow_color = palette.menu_selection().darkened();
-                    painter.blit_filtered(icon_rect.location(), *item.icon(), item.icon()->rect(), [&shadow_color](auto) {
+                    auto shadow_color = palette.menu_selection().darkened(0.7f);
+                    painter.blit_filtered(icon_rect.location().translated(1, 1), *item.icon(), item.icon()->rect(), [&shadow_color](auto) {
                         return shadow_color;
                     });
                     icon_rect.move_by(-1, -1);