Feature/use hcaptcha if bot (#1089)

* Add captcha to login page

* pull out shared method

* Update parse parameter logic

* Load captcha

* responsive iframe height
* correct i18n
* site key provided by server

* Fix locale parsing

* Add optional success callbackUri

* Make captcha connector responsive

* Handle parameter versions in webauthn

* Move variables to top of script

* Add captcha to registration

* Move captcha above `<hr>` div to be part of input form

* Add styled mobile captcha connector

* Linter Fixes

* Remove duplicate import

* Use listener to load captcha

* PR review

src/connectors/common.ts

@@ -13,3 +13,9 @@ export function getQsParam(name: string) {
 
     return decodeURIComponent(results[2].replace(/\+/g, ' '));
 }
+
+export function b64Decode(str: string) {
+    return decodeURIComponent(Array.prototype.map.call(atob(str), (c: string) => {
+        return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2);
+    }).join(''));
+}