Get tests for Button passing again

api/js/etemplate/Et2Button/ButtonMixin.ts

@@ -145,7 +145,7 @@ export const ButtonMixin = <T extends Constructor>(superclass : T) => class exte
 	{
 		return {
 			...super.properties,
-			image: {type: String},
+			image: {type: String, noAccessor: true},
 
 			/**
 			 * If button is set to readonly, do we want to hide it completely (old behaviour) or show it as disabled

api/js/etemplate/Et2Button/Et2Button.ts

@@ -12,6 +12,8 @@
 import {Et2InputWidget} from "../Et2InputWidget/Et2InputWidget";
 import '../Et2Image/Et2Image';
 import {SlButton} from "@shoelace-style/shoelace";
+import {ButtonMixin} from "./ButtonMixin";
+import {PropertyValues} from "@lion/core";
 
 
 export class Et2Button extends ButtonMixin(Et2InputWidget(SlButton))

api/js/etemplate/Et2Button/test/Et2Button.test.ts

@@ -55,12 +55,14 @@ describe("Button widget", () =>
 
 	it("gets an icon", async() =>
 	{
+		// Wait for the render to finish
+		await element.updateComplete;
+
 		element.image = "check";
 
 		// Wait for the render to finish
 		await element.updateComplete;
-
+		let image = element.querySelectorAll("et2-image");
-		let image = element.querySelectorAll("img");
 		assert.equal(image.length, 1);
 		assert.equal(image[0].src, element.egw().image("check"));
 	})

web-test-runner.config.mjs

@@ -46,7 +46,7 @@ export default {
 		[
 			{
 				name: 'api',
-				files: 'api/js/etemplate/**/test/*.test.js'
+				files: 'api/js/etemplate/**/test/*.test.ts'
 			}
 		].concat(
 			appJS.map(app =>