1.14 update checklist

[elidupree]

Critical:

• make change terrain usable through the new UI
• fix Mentor in multiple ways
• show can't cast messages
• fix (remove?) the unit_weapons texts during targeting (they currently don't update in time, like the gold theme item before I fixed it)
• See if I can find a place to put the spell description text that's convenient with the new UI
• Add tutorialization prompt for the user to click twice on their wizard
• Refine tutorialization prompts
• Add doubleclick prompt that the menu works better now
• side controller -> is_local

Minor:

• Arrange the spells more nicely
• fix displaying the movement range of the selected unit during spellcasting UI
• fix the visual glitches for displayed depletion of both gold/mana and action points (situations where it redisplays at your full amount before deducting them again)
• Make a way to use Scribe in the new UI
• Update game_action_simulations to match new wesnoth rules
• Time delay before accepting dialog input
• Fix fog?
• Fix faction icon code displayed in network game UI
• Make sure the persistent variables are working