Merge pull request from GHSA-m59c-9rrj-c399

* Sanitize HTML in processPastedHtml

* Add test

packages/app-desktop/jest.setup.js

@@ -0,0 +1,19 @@
+
+const { default: Logger, TargetType } = require('@joplin/lib/Logger');
+
+// TODO: Some libraries required by test-utils.js seem to fail to import with the
+// jsdom environment.
+//
+// Thus, require('@joplin/lib/testing/test-utils.js') fails and some setup must be
+// copied.
+
+const logger = new Logger();
+logger.addTarget(TargetType.Console);
+logger.setLevel(Logger.LEVEL_WARN);
+Logger.initializeGlobalLogger(logger);
+
+
+// @electron/remote requires electron to be running. Mock it.
+jest.mock('@electron/remote', () => {
+	return { require };
+});