config: make sure recaptcha is hidden when disabled

config/config-base.json

@@ -341,6 +341,7 @@
                     "required": false,
                     "requires_restart": true,
                     "type": "bool",
+                    "depends_true": "enabled",
                     "value": false,
                     "description": "More reliable, but requires some setup. See jfa-go wiki for more info."
                 },

ts/modules/lang.ts

@@ -56,6 +56,7 @@ export const loadLangSelector = (page: string) => {
             localStorage.setItem("timefmt", fmt);
         };
         const t12 = document.getElementById("lang-12h") as HTMLInputElement;
+        if (typeof(t12) !== "undefined" && t12 != null) {
             t12.onchange = () => setTimefmt("12h");
             const t24 = document.getElementById("lang-24h") as HTMLInputElement;
             t24.onchange = () => setTimefmt("24h");
@@ -69,6 +70,7 @@ export const loadLangSelector = (page: string) => {
                 t12.checked = false;
             }
         }
+    }
     let queryString = new URLSearchParams(window.location.search);
     if (queryString.has("lang")) queryString.delete("lang");
     _get("/lang/" + page, null, (req: XMLHttpRequest) => {