fix: set `max-hits`=false if sub-search used

[richardzilincikPantheon]

Some or all results could have been filtered away by sub-search criteria. resolves #672

[codecov[bot]]

Codecov Report

Merging #720 (0414031) into develop (549112e) will decrease coverage by 0.03%. The diff coverage is 0.00%.

:exclamation: Current head 0414031 differs from pull request most recent head 156b0f3. Consider uploading reports for the commit 156b0f3 to get more accurate results

@@             Coverage Diff             @@
##           develop     #720      +/-   ##
===========================================
- Coverage    78.10%   78.08%   -0.03%     
===========================================
  Files          112      112              
  Lines        12693    12697       +4     
===========================================
  Hits          9914     9914              
- Misses        2779     2783       +4     

Impacted Files	Coverage Δ
api/views/yangSearch/yangSearch.py	14.51% <0.00%> (-0.12%)	:arrow_down: