Fix tablist column calculation breaking

[Pablete1234]

The current logic could break in some scenarios, like a map having 9,1,9 players, means each of the big teams wants "1.8" columns, meaning they each get rounded to 2, plus the small team, makes a total of 5 columns.

I've ditched the logic of each team trying to figure out its size, instead the teams looking at all the other teams in the same row to make the decision.
For 2-team splits, one has to be significantly larger than the other for a 3/1 split, otherwise 2/2 split
For 3-team splits, one has to be bigger than the other two for a 2/1/1 split, otherwise 1/1/1 split (one empty column)
All other cases are trivial (1 team is 4 columns, 4 teams is 1/1/1/1).

Also fixes a long-time nit of mine, if a map has 6 teams before it would split like 1/1/1/1 first row, and 2nd row 1/1 leaving 2 unused columns. Now it would instead do 2/2 in the second row split, as teams look at all the other teams in the same row, instead of overall.

Eg:

(in this image, it is assumed that there would be enough obs to fill till that row)