Add script to allow user to change timezone from the config menu

scripts/core/sxmo_appmenu.sh

@@ -51,6 +51,7 @@ programchoicesinit() {
     Modem Log                  ^ 0 ^ sxmo_modemlog.sh
     Flash $(cat /sys/class/leds/white:flash/brightness | grep -E '^0$' > /dev/null && echo -n "Off → On" || echo -n "On → Off") ^ 1 ^ sxmo_flashtoggle.sh
     Bar Toggle                 ^ 1 ^ key Alt+b
+    Change Timezone            ^ 1 ^ sxmo_timezonechange.sh
     Rotate                     ^ 1 ^ sxmo_rotate.sh
     Upgrade Pkgs               ^ 0 ^ st -e sxmo_upgrade.sh
   ")" && WINNAME=Config && return

scripts/core/sxmo_timezonechange.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env sh
+T="$(
+  find /usr/share/zoneinfo -type f | 
+  sed  's#^/usr/share/zoneinfo/##g' |
+  sort |
+  sxmo_dmenu_with_kb.sh -p Timezone -c -l 10 -fn Terminus-20 -i
+)"
+
+st -e sh -c 'sudo setup-timezone -z '$T' && echo 1 > /tmp/sxmo_bar && echo Timezone changed ok && read'