[nomerge] use orange-widget-base@itemdelegates

Author: ales-erjavec

tox.ini

@@ -26,6 +26,7 @@ setenv =
 deps =
     pyqt5==5.12.*
     pyqtwebengine==5.12.*
+    git+git://github.com/biolab/orange-widget-base.git@refs/pull/139/head
     -r {toxinidir}/requirements-opt.txt
 commands_pre =
     # Verify installed packages have compatible dependencies