Fix tests that relied on button text

test/integration/costumes.test.js

@@ -39,7 +39,7 @@ describe('Working with costumes', () => {
     test('Adding a backdrop', async () => {
         await loadUri(uri);
         await clickXpath('//button[@title="tryit"]');
-        await clickText('Add Backdrop');
+        await clickXpath('//button[@title="Add Backdrop"]');
         const el = await findByXpath("//input[@placeholder='what are you looking for?']");
         await el.sendKeys('blue');
         await clickText('Blue Sky'); // Should close the modal

test/integration/localization.test.js

@@ -30,7 +30,7 @@ describe('Localization', () => {
         await loadUri(uri);
         await clickXpath('//button[@title="tryit"]');
         await clickText('Blocks');
-        await clickText('Extensions');
+        await clickXpath('//button[@title="Add Extension"]');
         await clickText('Pen', scope.modal); // Modal closes
         await new Promise(resolve => setTimeout(resolve, 1000)); // Wait for scroll animation
         await clickText('English');

test/integration/sounds.test.js

@@ -74,7 +74,7 @@ describe('Working with sounds', () => {
         await clickText('A Bass'); // Closes the modal
 
         // Now add a sprite with only one sound.
-        await clickText('Add Sprite');
+        await clickXpath('//button[@title="Add Sprite"]');
         await clickText('Abby'); // Doing this used to crash the editor.
 
         await new Promise(resolve => setTimeout(resolve, 1000)); // Wait for error