Also fixes a bug where a bunch of eeschema settings weren't getting
loaded because it looked like they were larger than the max value
(which wasn't being scaled from mils to internal units).
Fixes https://gitlab.com/kicad/code/kicad/issues/2089
Some graphic line thickness were initialized to 0.
The actual line thickness is set after reading config.
But in some cases the config does not exist, and 0 line thickness creates draw issues.
CHANGED: Settings are now stored in versioned sub-directories
ADDED: First-run dialog for migrating settings from a previous version
CHANGED: Settings are now stored as JSON files instead of wxConfig-style INI files
CHANGED: Color settings are now all stored in a separate settings file
CHANGED: The symbol editor and footprint editor now have their own settings files
CHANGED: Color settings are no longer exposed through BOARD object
CHANGED: Page layout editor now uses Eeschema's color scheme
Settings are now managed through a central SETTINGS_MANAGER held by PGM_BASE.
Existing settings will be migrated from the wxConfig format on first run of each application.
Per-application settings are now stored in one class for each application.
Jeff Young
jean-pierre charras
Jon Evans