Add Dungeon Log Limiter & Change Healing log behavior

Dungeon Logs still have a tendency to draw past the borders of the screen when you get a lot of elements. This can happen easily with the healing logs if you have enough bronze rings and a character with 1 HP and really high max hp. This commit limits the number of dungeon logs that can render at any given time to 7, and only displays the healing log when the healing skill can get the party member(s) to max hp.

I am open to working on making the limit value accessible to the user, and will probably do so, I just don't know what the best method for that should be rn.