[Proposal] Monster Recall Highlighting for Troublesome Monsters

[eibwen]

As of 3.1.2v2, monster recall highlighting appears to be:

color	type
purple	unique
red	out of depth
white	everything else

However, there are in-depth non-unique monsters that are very capable of significant damage or even (near) instant kill depending on a number of factors.

Granted, angband is inherently not a "fair" game, as a single mistake can result in death. As such, requests to remove some of the more difficult monsters have been declined, commenting that players should learn from experience.

However, player's who have had that experience with certain monsters may not recall it until it's far too late... (even if the knowledge is available through the monster memory).

Proposing highlighting monsters in yellow that have killed significant numbers of your ancestors, who have yet to be avenged or perhaps you've only been able to kill once or twice or are known to have a max damage / turn that far exceeds your own or your max HP.

color	type
purple	unique
red	out of depth
yellow	difficult/challenging/troublesome
white	everything else

[magnate]

This is essentially a duplicate of #334, but it's worth leaving open for the possibility of using a warning colour for monsters which have killed a significant number of ancestors.