DomTerm version 3.2.0

Remove no-longer-needed setting of z-index

Changes to menu handling

Most importantly the Electron front-end  doesn't need the 'remote'
module (which is removed in Electron 14) any more

domterm version 2.1

Miscellaneous documentation updates.

Various Makefile.am fixes for the sake of 'make distcheck'.

Bump version number to 0.99.

Linkify improvement for puctuation at end of link.

More spec file tweaks.

Increase version number 0.71.