In Walkie Talkie, an invitation you emailed or a link you made did not appear under Invitations waiting until the page was reloaded. It now appears as soon as it is made. Withdraw removes the invitation from the list without reloading the page, on the conversations page and in a channel's Invitation links. Withdrawing a channel link now asks first, as withdrawing any other invitation does.
Walkie Talkie invitations show at once
An invitation you send in Walkie Talkie now appears under Invitations waiting straight away, and Withdraw removes it without reloading the page.