core: do not delete/insert edges when changing the order via mod_menu

(cherry picked from commit f82a7d3d406e25f4a4b1bcbfb24caea6242b4040)
(cherry picked from commit b290f88955b5b09c320eca76cddfa93e455184d2)
core: remove nested transaction from the z_edge_log_server check.

(cherry picked from commit f00bd2061baffe26ee407ea19fe73fbc39a53a31)
(cherry picked from commit 42514e872c3e5939c26eca219fcb5ce93ef83183)
mod_admin: if date is not editable, display it as text.

(cherry picked from commit 591aa487a7fdef7da2a3f3f0823e12378bc8f486)

Conflicts:
	modules/mod_admin/templates/_edit_date.tpl

(cherry picked from commit d95b9c3f77dd12e98b11213ef3fbf3a028d22e04)
mod_admin: more generic css for .category spans.

(cherry picked from commit 08e2642eade710f4a007f5ab6a5cdefc4078575f)

Conflicts:
	modules/mod_admin/lib/css/zotonic-admin.css

(cherry picked from commit 5635b3f8ad884d4b9cf159c16af2cc8a68b33d12)
mod_menu/mod_admin_frontend: enable editing of collections as side-menu.

(cherry picked from commit 5a0fbaf4d4f727a18f6a3d720165838a18c5b437)

Conflicts:
	modules/mod_admin_frontend/templates/_admin_frontend_edit.tpl

(cherry picked from commit 2cedc5f6657ad646b2fd16e7079da2933852708a)