web/user: fix user details not rendering when loading to a different user settings tab and then switching

closes #1664

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

web/src/elements/forms/Form.ts

@@ -30,6 +30,8 @@ export class APIError extends Error {
 
 @customElement("ak-form")
 export class Form<T> extends LitElement {
+    viewportCheck = true;
+
     @property()
     successMessage = "";
 
@@ -274,7 +276,7 @@ export class Form<T> extends LitElement {
     }
 
     render(): TemplateResult {
-        if (!this.isInViewport) {
+        if (this.viewportCheck && !this.isInViewport) {
             return html``;
         }
         return this.renderVisible();

web/src/elements/forms/ModelForm.ts

@@ -5,8 +5,6 @@ import { EVENT_REFRESH } from "../../constants";
 import { Form } from "./Form";
 
 export abstract class ModelForm<T, PKT extends string | number> extends Form<T> {
-    viewportCheck = true;
-
     abstract loadInstance(pk: PKT): Promise<T>;
 
     @property({ attribute: false })