* Make LIB_TABLE_BASE::GetCount() return unsigned. This is more
consistent with the behaviour of STL containers (especially the
boost::ptr_vector this is really accessing). Sadly
wxGridTableBase() forces an int, so a cast is still required
at the WX interface.
* Make LIB_TABLE_BASE::At() return a reference. First, this is more
consistent with normal STL indexing operator[]'s, and secondly, it
allows an idiomatic const index method (so you can access const
LIB_TABLE_ROWs from a const LIB_TABLE_BASE).
The motivation is to allow use of this class and LIB_TABLE_ROW
in a test program, where the LIB_TABLE_BASE is const.
When creating new lib table rows, the pointer becomes managed by the new
table through the boost::ptr_vector. The row is non-copyable, however,
so we lose the reference as soon as it goes out of scope. Creating a
clone provides a new pointer that is moved into the table on creation.
Fixes: lp:1792456
* https://bugs.launchpad.net/kicad/+bug/1792456
Spooling up a full PLAYER in the background takes too long.
This also fixes bugs around how the tables are saved, although
that was just missing code rather than anything architectural.
Fixes: lp:1785436
* https://bugs.launchpad.net/kicad/+bug/1785436
This also fixes a bunch of bugs where an error during save would
still close the window (rather than cancelling the close action).
Fixes: lp:1785034
* https://bugs.launchpad.net/kicad/+bug/1785034
John Beard
Seth Hillbrand
Jeff Young