Allow the request button to remain available for all users, even when someone else requested the item

[morenicano]

Is your feature request related to a problem? Please describe.
I'm not sure if this qualifies as a problem or not, but it's undesired behavior. Currently, if a user makes a request for something, the request button changes to a requested by x users, however for first-time users seeing this, may not realize that they can also press that same button to place the request as well.

Describe the solution you'd like
The ability for any user to see the request button, regardless of whether someone else has already placed a request for the item.

Describe alternatives you've considered
The ability to display a message on the page that lists how many people requested the item, but leave that information separate from the request button to avoid confusion .

Additional context
It would also be nice if the user could remove their request for that item in case they changed their mind, clicked the wrong version, etc, without the approver having to decline the request.

[Noviets]

It does currently do this.
The "Request" button is available to everyone for already requested media. The only exception is it's not available for the users that have already requested it.

Note: This is not always the case due to a UI bug, which is addressed in the dev branch, but this is the expected behaviour.