For legacy boards, the setting is picked up from the board outline
thickness. If the board outline has mixed thicknesses, then the
max is used and a warning is displayed.
Fixes: lp:1797787
* https://bugs.launchpad.net/kicad/+bug/1797787
Remove all symbol libraries from the project file after remapping to
prevent symbols that should be loaded from the cache being loaded from
a library further up the search order. Save the project file to clear
all of the libraries so they never get reloaded again.
Remove the symbol library management dialog and menu entries.
Rename the symbol library table dialog menu entry.
Remove all symbol libraries from default project file to prevent clashes
with the cache library.
Fix illegal symbol naming in Eagle plugin.
File "rules" has instructional text as comments near top.
2) Convert all text files in repo to LF line ending form.
Any checkout done with "rules" in play will convert the working
tree to native line ending, while keeping repo as LF line ending.