Make light mode possible via gsettings based off a marker

config/waybar/config

@@ -92,11 +92,11 @@
     "format-disabled": "󰂲",
     "format-connected": "",
     "tooltip-format": "Devices connected: {num_connections}",
-    "on-click": "GTK_THEME=Adwaita-dark blueberry"
+    "on-click": "blueberry"
   },
   "pulseaudio": {
     "format": "{icon}",
-    "on-click": "GTK_THEME=Adwaita-dark pavucontrol",
+    "on-click": "pavucontrol",
     "on-click-right": "pamixer -t",
     "tooltip-format": "Playing at {volume}%",
     "scroll-step": 5,