[Dolphin] Hide tooltip instantly on key press
Instantly hide tooltip shown over an element when a key is pressed.
Currently, when pressing an alphanum key to select a different file,
the tooltip continues to cover much of the window - often hiding that newly selected file from view.
Reviewers: Dolphin, ngraham, elvisangelaccio
Reviewed By: Dolphin, elvisangelaccio
Subscribers: broulik, elvisangelaccio, kfm-devel, pdabrowski
Differential Revision: https://phabricator.kde.org/D22512