Optimize board resizing

[extrajordanary]

At the end of a game, I'm on a 23x23 board, but based on the tile arrangement I only need to be on one 14x14 to contain all the tiles and have a 1 empty square buffer on all sides.

Would be nice to only add rows or columns on the side where tiles are getting close to the edge. So not adding 2 rows and 2 columns each time. Could add just 1 of each to the appropriate side and/or make it so that the tile contents are always re-centered.

This will help keep the tiles at a larger size for longer.

[AlexNisnevich]

We've tried doing this in the past but it became a bit tricky to keep track of board state that way and we got stuck. But it's definitely something we should look at again. Any ideas, @neunenak ?