improve eww

modules/home/wayland/apps/eww/bar/windows/popup.yuck

@@ -1,4 +1,8 @@
 
+; Monitor the popup is currently open on (set by scripts/panel-toggle), so a
+; panel switch on the same monitor is an in-place revealer transition.
+(defvar popup-screen "")
+
 (defwidget popup-win []
   (box :space-evenly false :orientation "v"
     (revealer :reveal {active-panel == "sys"} :transition "slidedown" :duration 120