app-office/taskcoach: version bump to 1.4.6

app-office/taskcoach: version bump to 1.4.6

Changes in the new ebuild:
* Version bump from 1.4.3 to 1.4.6
* EAPI bump to 7
* versionator.eclass inherit removed (it was not used)
* eutils.class inherit replaced with desktop.eclass and PATCHES array
* HOMEPAGE changed to HTTPS
* LICENSE fixed (COPYRIGHT.txt says GPL 3 or later)
* IUSE=libnotify removed (this was not announced in the changelog but
  the code appears to have been removed)
* fix-desktop-file.patch no longer used (patching that file was
  pointless because the shipped desktop file was ignored in favour of
  make_desktop_entry anyway)

Package-Manager: Portage-2.3.76, Repoman-2.3.16
Signed-off-by: Christopher Head <chead@chead.ca>
Closes: https://bugs.gentoo.org/677974
Closes: https://github.com/gentoo/gentoo/pull/13679
Signed-off-by: Joonas Niilola <juippis@gentoo.org>