Fix legacy tablist empty spots

[Pablete1234]

Currently 1.7 tablist has some slots that never get updated. This is the result of internal changes in adventure, causing the strings having the same color code to serialize differently.

The scoreboard team player would be like this (notice the $0 is only once, instead of before each char):

While the name entries themselves are indeed repeated:

Note in this last picture, all the missing entries are the ones with colors right after another.

To fix this i've moved away from using adventure at all to create these deranged names, and instead went to handling plain old strings instead, hardcoding what i needed directly. Now all entries are 2 chars each (enough for up to 255 slots, since it's HEX), and