Bug in calculating space to allocate, there's sometimes remaining space even though sizes total is 100

[queen3]

The method equalizeAfterAddOrRemove initializes let leftToAllocate = 0 and then subtracts as leftToAllocate -= pane.size.

This results in leftToAllocate to be always negative (usually -100) and thus it is always considered that there's something to allocate, which leads to strange cases when there's empty unallocated space (on the right).

The proper initialization is leftToAllocate = 100.