Closes #322 - Add the menu divider in onInitialize() only when:

- the parent is not ListView
- the parent is a ListView that reuses its items

Otherwise re-add it in onConfigure
Issue #322 - Fix the condition when the "divider" CSS class should be set in case of a ListView
Merge branch 'master' into issue-322-menu-divider
Merge pull request #325 from l0rdn1kk0n/issue-322-menu-divider

Closes #322 - Add the menu divider in onInitialize() only when: