Each value in the array is the maximum number of entries that node can
have before it is being collapsed. The last value is repeated for all
further levels.
Example:
array(10,5,0) - Nodes from the first level are expanded if they have less
than or equal to 10 child nodes. Nodes from the second level are ex-
panded if they have less or equal to 5 nodes and all lower levels
are collapsed.
Note:
To reset, simply call this function with no arguments.
