This adds the same "x" button as we have in "stream search" or "people
search" to the user status modal.
The button is shown if someone types something, or if the status
message was already set (meaning there was already a value in the
input field). If the input field is empty, the button is not visible.
This fixes the follow-up comments from #12179.
Having it say "Clear" when you delete an existing status was a nice touch,
but it's confusing when you first open the modal and the text of the button
says "Clear".
I think the right medium-term solution here is for this modal to have "Save"
and "Cancel" buttons, and for there to be a small UI element in the user
popover itself that allows you to clear your current status.
Alexandra Ciobica
Rishi Gupta
Steve Howell