ui-notification - display payload or a string

Instead of the ui-notification displaying the incoming msg top left of the overlay, could there be an optional name property, like other UI nodes, so we could enter text instead of showing the payload, so for example we could enter " Please confirm action" as a string.
Also... if the user selects 'string', and the field is left blank, then the space that the string would have occupied, could be removed, which would reduce the height of the the overlay, making it look less intrusive. (...if that makes sense!!)

During a [forum discussion](https://discourse.nodered.org/t/formatting-ui-notification/90348/9), @Steve-Mcl suggested that having a typed input would enable users to select either the msg or a string, but warned that it may not be possible??

Dashboard v1.15.0

The issue does not name a file or test; start by locating the ui-notification implementation and reviewing the linked forum discussion for the proposed typed input behavior. Done means users can choose the incoming message or an entered string, and a blank string does not reserve overlay space.

Written by the indexing model from the issue text.