Bug with RoomsHamburgerButton

[sungchoi]

Error: viewTop is null
cannot call $el on null
PageContainer#handleToggleHamburgerLeftCommand

How I get to this error:

1. Enter a room.
2. Click hamburgerButton x number of times.
3. Go back to user home page.
4. Enter another room
5. Click hamburgerButton. --> Error

[sungchoi]

1. Enter a room.
2. Click home button.
3. Enter room again.
4. Click hamburgerButton --> Error

yields the same result.

[sungchoi]

1. Enter a room.
2. Click the hamburger button. --> hamburger panel opens up.
3. Click another room in the hamburger panel. --> enter new room.
4. Click the hamburger button --> error.

It appears this error is not caused by clicking the home button or return to the user homepage.
Something with exiting a room and then entering the same or different room.

[sungchoi]

Deduced cause: The page container is not being deinitialized; therefore the commandModule subscriptions persist causing an error when called.

This also why the codeEditor button is running into the same problem.