style: replace solid accent hover/active with glass effect

- glass-hover: alpha(@foreground,0.08) → alpha(white,0.10)
- glass-active: alpha(@foreground,0.14) → alpha(white,0.50)
- panel, settings, dropdown, tray, notification hover → glass-hover
- battery, wifi, bluetooth connected icons → glass-active
- wifi-icon-box base dimmed to glass-hover for contrast

src/styles/notification/notification_buttons.css

@@ -77,8 +77,8 @@ menu.mac-context-menu {
 }
 
 .mac-context-menu menuitem:hover {
-  background-color: @glass-accent;
-  color: @glass-overlay-dark;
+  background-color: @glass-hover;
+  color: @glass-text;
 }
 
 .mac-header-pill {