On new contribution, when priceset chosen remove 'Alternatively, you can use a price set.'
On backoffice new contribution screen, there is on screen help text under Total Amount field saying 'Alternatively, you can use a price set.' Clicking button to choose a price set incorrectly leaves the text there after the price set is displayed. Clicking the Price Set field toggles to make it disappear even if the selection is 'Choose price set' which removes price set.
Fix to display this text when price set is not (yet) selected, and to hide it when a price set is selected.