Node limit interaction with lowerbound / upperbound OFF

[rooklift]

When using a node limit for Stockfish (say 10M) if we are ignoring upperbound / lowerbound info (i.e. that option is OFF), we may well end up displaying less than the requested nodes.

i.e. if SF's last complete analysis was for 7M nodes, and it reaches 10M and stops, and only sends upperbound / lowerbound info, we will be displaying the 7M analysis.

To reproduce, make sure MultiPV is 1 (seems to matter).