Display warning infobar in the board/schematic setup when no project
is loaded, since most of the settings in those dialogs are saved in
the project and not in the board/schematic file.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/4868
ADDED Eeschema-specific netclass settings including wire and bus
thickness, color, and line style.
Netclasses override individual wire & bus colors and line styles.
If that proves an issue we might look at something more sophisticated
with inheritance.
Fixes https://gitlab.com/kicad/code/kicad/issues/4581
Set up a new lineage for SCH_ITEMS to get back to the SCHEMATIC
they live on: Items will all be parented to the SCH_SCREEN that
they are added to, and each SCH_SCREEN will point back to the
SCHEMATIC that it is part of. Note that this hierarchy is not
the same as the actual schematic hierarchy, which continues to
be managed through SCH_SHEETs and SCH_SHEET_PATHS.
These panels must have the wxTreeBook as parent to receive mouse and key events.
They previously have the dialog itself, but it does not work on any OS.
Jon Evans
Tomasz Wlostowski
Mark Roszko
Ian McInerney
Jeff Young
jean-pierre charras
Wayne Stambaugh