Bug#885143: libreoffice-gtk2: Drop gtk2 support

[Jeremy Bicha <jbicha@debian.org>]

On Sun, Dec 24, 2017 at 1:05 PM, Jean-Philippe Memgual
<mengualjeanphi@free.fr> wrote:
> things may have changee but iirc gtk3 release of lo had many display issues. The support of this toolkit release has been in dev and more or less experimental and not stable enough. Hence gtk2 in debin. Even upstream seem to recommend gtk2 if one has display bugs.

Ubuntu (and all its flavors) have been shipping only the gtk3 version
by default since 5.2 over a year ago. Only the gtk3 version provides
native Wayland support and has better display of keyboard
shortcuts/accelerators in the File/Edit/View menus.

This bug is really about Buster, which is not expected to be a stable
release until 2019.

Thanks,
Jeremy Bicha