Tweak dunst sizes for bigger icons

We're cheating icon usage to put thumbnails in notifications, so we need
a bit more room to play with.

.config/dunst/dunstrc

@@ -2,7 +2,7 @@
 	font = "Sans 12"
 	origin = top-left
 	width = 600
-	height = (0, 100)
+	height = (0, 256)
 	offset = 0x0
 	padding = 1
 	horizontal_padding = 1
@@ -45,7 +45,6 @@
 	sticky_history = yes
 	history_length = 500
 
-	browser = /bin/x-www-browser
 	dmenu = /usr/bin/rofi -dmenu -p dunst
 
 	mouse_left_click = close_current
@@ -91,3 +90,7 @@ separator_color = "#f0f0f0"
 	appname = "aerc"
 	summary = "New mail in RSS from*"
 	format = ""
+
+[Doorbell]
+	appname = "doorbell"
+	max_icon_size = 256