#3204 onEnter/onExit for Drawer

[daviscabral]

This adds support to execute the drawer enter/exit handlers.
That might be also considered a bug - since it accepts onEnter and onExit but does not call it.

Closes #3204.

[daviscabral]

@aksonov do you think after this PR we can generate a new release?

[aksonov]

@daviscabral Yes, I think so. Will check it today.

[aksonov]

LGTM

[daviscabral]

Thank you.

[lironhl]

onEnter not working inside the contentComponent of the Drawer, for example:
This works fine:
<Drawer contentComponent={SideMenu} onEnter={() => console.log("Drawer Opened")} >

but when I try to declare onEnter inside SideMenu component it won't be executed.
export default class SideMenu extends Component { onEnter() { console.log('Drawer Opened'); } }