include aria-label in top toolbar

qt doesn't seem to support it at the moment though

https://anki.tenderapp.com/discussions/beta-testing/1130-latest-anki-beta-not-accessible-with-voiceover-on-mac-os

aqt/toolbar.py

@@ -42,8 +42,8 @@ class Toolbar:
         buf = ""
         for ln, name, title in links:
             buf += '''
-            <a class=hitem title="%s" href=# onclick="pycmd('%s')">%s</a>''' % (
-                title, ln, name)
+            <a class=hitem aria-label="%s" title="%s" href=# onclick="pycmd('%s')">%s</a>''' % (
+                name, title, ln, name)
         return buf
 
     # Link handling