Bugfix: fix lags for correl_matrix

[emhbrine]

If two sets of categories are supplied through xcats and xcats_secondary, lags and lags_secondary should specify lags for these sets respectively. Previously, lags would specify lags for both sets if lags_secondary was empty.

[codecov]

Codecov Report

Merging #1090 (b85caf7) into develop (7665581) will increase coverage by 0.01%.
Report is 1 commits behind head on develop.
The diff coverage is 100.00%.

❗ Current head b85caf7 differs from pull request most recent head 5be7518. Consider uploading reports for the commit 5be7518 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1090      +/-   ##
===========================================
+ Coverage    65.32%   65.34%   +0.01%     
===========================================
  Files           48       48              
  Lines         5156     5153       -3     
===========================================
- Hits          3368     3367       -1     
+ Misses        1788     1786       -2     

Files	Coverage Δ
macrosynergy/panel/view_correlations.py	67.32% <100.00%> (+0.65%)	⬆️