script: rename general_ui and separate dialog

scripts/ui/update_dialog.sh

@@ -0,0 +1,27 @@
+#######################################
+# description Advise user to update KIAUH
+# Globals:
+#   KIAUH_WHIPTAIL_NORMAL_HEIGHT
+#   KIAUH_WHIPTAIL_NORMAL_WIDTH
+#   RET
+# Arguments:
+#  None
+#######################################
+kiauh_update_dialog() {
+  whiptail --title "New KIAUH update available!" \
+    --yesno \
+    "View Changelog: https://git.io/JnmlX
+
+It is recommended to keep KIAUH up to date. Updates usually contain bugfixes, \
+important changes or new features. Please consider updating!
+
+Do you want to update now?" \
+    "$KIAUH_WHIPTAIL_NORMAL_HEIGHT" "$KIAUH_WHIPTAIL_NORMAL_WIDTH"
+
+  local out=$?
+  if [ $out -eq 0 ]; then
+    do_action "update_kiauh"
+  else
+    deny_action "kiauh_update_dialog"
+  fi
+}