[Sidebar] Suggestion | Feature Request ngx-admin/#1796

### Issue type

**I'm submitting a ...** (check one with "x")

* [ ] bug report
* [x] feature request
* [ ] question about the decisions made in the repository

### Issue description
Tooltip options should be available on menu-item.component.

**Current behavior:**
On the left **sidebar > menu-item.component** an major options is missing that's belong to usability and that is tooltip with right position.

**Expected behavior:**
Tooltip options should be available on menu-item.component only when sidebar **state="compacted"** .


MOVED FROM https://github.com/akveo/ngx-admin/issues/1796