style(ui): request that all types defined

- check in more restrictive mode = request types
- define main types in static/js/core/types.js

static/js/views/nextcloud/error.js

@@ -6,6 +6,10 @@ var errorTitle = document.getElementById('error-title');
 var errorMessage = document.getElementById('error-message');
 var errorAction = document.getElementById('error-action');
 
+if (!errorTitle || !errorMessage || !errorAction) {
+    throw new Error('missing html elements');
+}
+
 switch (errorType) {
     case 'invalid-credentials':
         errorTitle.textContent = 'Login Failed';