ADDED: Allow DXF/SVG graphics to be imported as a group
Also, cleanup the placement routine to allow the edit tool's flip
and rotate routines to be used when placing the items.
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.
Improve padding, spacing and alignment of dialog layout.
Fix title capitalization.
Make file dialog wildcard string translatable.
Remove fixed initial dialog size to allow sizers to work their magic.
Replace OK button event handler with TransferDataFromWindow.
Remember last line width units between dialog instances and sessions.
Save configuration file settings in a separate group and remove GfxImport
prefix from the entry names.
Add fencing to dialog header file to prevent nested includes.
Fixes lp:1822568
https://bugs.launchpad.net/kicad/+bug/1822568
* Do not compile dxf old files.
* import gfx, gal mode: make absolute placement working.
* Import gfx in legacy canvas: use it and make interactive placement working
* Take imported line width in account. Ensure DXF line thickness is OK.
* handling empty files in legacy mode.
Ian McInerney
Jon Evans
Wayne Stambaugh
John Beard
jean-pierre charras