Wesnoth 1.17.10

Terrain

• `^Qhhf` and `^Qhuf` terrain codes available to allow forest terrain on bluff/gulch hexes

Translations

• Updated translations: British English, Czech, French, Polish, Portuguese (Brazil)

Units

• Merkfolk units movement cost on forest and hills reduced from 5 to 4.
• Orcish Slayer can advance to the Orcish Nightblade by default.
• Orcish Slayer's xp required to level up reduced from 100 to 64.
• Dunefolk Falconer portrait added.

Miscellaneous and Bug Fixes

• Fixed not being able to undo moves (bug #6898)