fix: provide an empty alt="" for more button icon

Signed-off-by: Parth Raiyani <[email protected]>
Change-Id: I5a51781d07efdae16895469caedbaa4526075a2e

Author: rparth07

browser/src/control/jsdialog/Widget.OverflowGroup.ts

@@ -64,6 +64,7 @@ function createMoreButton(
 	moreOptionsButton.setAttribute('aria-pressed', 'false');
 
 	const img = document.createElement('img');
+	img.alt = '';
 	app.LOUtil.setImage(img, 'lc_overflow-morebutton.svg', app.map);
 	moreOptionsButton.appendChild(img);