Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
This moves a fiddly little bit of logic used by a few UI
classes into a central location.
Also means that the paths dialog learns to expand the
first cell when it needs to (like the text variable
panel).
This allows us to switch back to a standard modal dialog (instead of
quasi-modal, which has problems with Ctrl-V in a search box inside a
standard file dialog -- such as when picking a path).
Fixes https://gitlab.com/kicad/code/kicad/issues/9473
