Fix flaky e2e-tests

Author: jmattheis

ui/src/tests/message.test.ts

@@ -219,6 +219,7 @@ describe('Messages', () => {
     it('deletes all linux messages', async () => {
         await navigate('Linux');
         await page.click('#delete-all');
+        await page.waitForSelector('#delete-all:disabled');
         await expectMessages({
             all: [windows3, backup1, windows1],
             windows: [windows3, windows1],
@@ -268,6 +269,7 @@ describe('Messages', () => {
     it('deletes all backup messages and navigates to all messages', async () => {
         await navigate('Backup');
         await page.click('#delete-all');
+        await page.waitForSelector('#delete-all:disabled');
         await navigate('All Messages');
         await createMessage(backup3, backupServerToken);
         await waitForExists(page, '.message .title', backup3.title);

ui/src/tests/plugin.test.ts

@@ -170,6 +170,7 @@ describe('plugin', () => {
                     await toggleEnabled(1);
                 }
                 await inDetailPage(1, async () => {
+                    await page.waitForSelector('.displayer a');
                     const hook = await page.$eval('.displayer a', (el) => el.getAttribute('href'));
                     await axios.get(hook!);
                 });