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
Versions specific variables that may point to objects that change
through versions, allowing multiple KiCad versions to operate correctly
(even on MSW) on the same machine.
When no default library tables are found, set the default wxFilePickerCtrl
to the users configuration path instead of the current project path to
prevent any project library tables from being used as the default.
Fixes lp:1809769
https://bugs.launchpad.net/kicad/+bug/1809769
Factor out common dialog code from global symbol library table dialog for
loading initial library table.
Update global symbol library table code to user factored out common dialog
code.
