Tcl::pTk: replace ROText with approach from Tcl::Tk?

The ROText approach in Tcl::pTk has some issues that prevent it from =
being read-only: https://rt.cpan.org/Ticket/Display.html?id=3D125420

- text is removed by keyboard shortcut for cut
- enter/return/tabs aren=E2=80=99t ignored

The ROText in Tcl::Tk seems to not have any of these issues. I would be =
interested in copying it over to Tcl::pTk, but would like to check if =
there=E2=80=99s any known issues that might affect its compatibility =
with Perl/Tk. I think the snit requirement is fine especially if the =
fallback approach can be incorporated.


(Sometimes I think it would be great if there was a better way to reuse =
things in Tcl::pTk from Tcl::Tk and Perl/Tk besides copying them, i.e. a =
way that keeps track of any changes upstream. It would probably require =
significant restructuring of all 3 modules, though.)=