QoL improvement: Map markers

[Snugglesaurus]

It would be pretty neat if we could mark the map by clicking on it, kind of like you can by right clicking in minesweeper. I'm thinking right click on a square on the map once to make a flag mark on it, right click again to make a red "X" on it, and right click again to clear the mark.

Would be great for marking spawn points when leveling, or putting a mark on the map to remind yourself not to go there (e.g. for places that trap you, or kill you).

[NiteHawk]

It's a pretty cool idea, will eventually see to it sometime.