C++20 added new reverse and rewritten candidates. This can confuse the compiler because it'll test both A==B and B==A for overloads.
Because we were defining parent class equality overloads, A==B and B==A was considered ambigious due to both being compatible in casting.
So we needed to add explicit child class equality operator overloads
Also fixes some bugs with property exposure that (along with
other things) allowed you to put table cells on a different
layer than their parent table.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/17438
Also adds support for tabbing between table cells in the
table editor dialog.
Also adds support for calling the table editor dialog from
edit properties on a table selection.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/17337
Jeff Young
Marek Roszko