Bug 28904: Add newsletter editor to about page display

Bug 28904: Add newsletter editor to about page display

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 77448b618d1865a21815d434f071a223d706f21b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 86282f26d1ecbaeec00d2a97f4578914dede4bdd)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>