Vendor the command set the menu and shell depend on

bin/blob-menu-timezone

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# blob:summary=Select and set the system timezone
+# blob:group=menu
+# blob:name=timezone
+
+set -e
+
+timezone=$(timedatectl list-timezones | blob-menu-select "Set timezone" -- --width 520 --maxheight 520) || exit 1
+sudo timedatectl set-timezone "$timezone"
+blob-shell -q blob.clock refresh
+blob-notify-send "Timezone is now set to $timezone"