Wesnoth 1.16 marks the old Mushroom Grove overlays (^Uf, ^Ufi) as deprecated in favour of several new terrains including the Mycelium base (Tb) and the new Mushroom Grove overlays (^Tf, ^Tfi).
This is a rather confusing task and there's no easy way to get it out of the list without harming Wesnoth 1.14 support in some way, so this should only be dealt with once Wesnoth 1.14 support is no longer necessary (i.e. at some point after Wesnoth 1.16.0 is released).
Wesnoth 1.16 marks the old Mushroom Grove overlays (
^Uf,^Ufi) as deprecated in favour of several new terrains including the Mycelium base (Tb) and the new Mushroom Grove overlays (^Tf,^Tfi).This is a rather confusing task and there's no easy way to get it out of the list without harming Wesnoth 1.14 support in some way, so this should only be dealt with once Wesnoth 1.14 support is no longer necessary (i.e. at some point after Wesnoth 1.16.0 is released).
(Do not add this to #71.)