looks like it is passed and accessed like a string
so unless I'm going insane, it should be a string.
fixes
```
rageshake.js:61 Warning: Failed prop type: The prop `onClick` is marked as required in `AccessibleButton`, but its value is `undefined`.
in AccessibleButton (created by RoomHeader)
in RoomHeader (created by RoomView)
in div (created by RoomView)
in RoomView (created by LoggedInView)
in main (created by LoggedInView)
in div (created by LoggedInView)
in div (created by LoggedInView)
in LoggedInView (created by MatrixChat)
in MatrixChat
```
Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
