add symbols/patterns to player locator icons (for us colorblind folk)

the player indicators can be hard to distinguish for me as a colorblind person, especially since they're small.

the different colors are great, but a lot of colors look similar - especially to people with anomalous color vision :(

i think adding patterns/symbols to the icons would be really helpful; even if two people have similar colors, they'll have different icons so you can actually distinguish them.

for example, if you have 2 red people, you can't tell them apart. but if one red person has a plus pattern and the other one has no patterns, you can tell them apart more easily!

i suggest this for us colorblind people but it definitely would benefit people with normal color vision as well. i'm sure dinnerbone would appreciate this ;)