Enh: show incomplete pragmas

[n-wbrown]

Adds a category to the debug interface to show TwinCAT variable chains that have not been fully rendered to records. Alterations have been made to the chain generation procedures to make it less dependent upon record generation to allow flawed records to be generated. closes #147

Also addresses some oddities in the debug interface's config_info table not drawing properly. closes #158

[codecov-io]

Codecov Report

Merging #159 into master will increase coverage by 0.37%. The diff coverage is 57.89%.

@@            Coverage Diff             @@
##           master     #159      +/-   ##
==========================================
+ Coverage   78.25%   78.63%   +0.37%     
==========================================
  Files          17       17              
  Lines        1936     2031      +95     
==========================================
+ Hits         1515     1597      +82     
- Misses        421      434      +13

Impacted Files	Coverage Δ
pytmc/bin/db.py	44.94% <100%> (+1.26%)	:arrow_up:
pytmc/record.py	92.46% <100%> (+0.23%)	:arrow_up:
pytmc/bin/debug.py	48.96% <20.68%> (-2.46%)	:arrow_down:
pytmc/pragmas.py	95.15% <95.83%> (+0.11%)	:arrow_up:
pytmc/parser.py	87.98% <0%> (+0.18%)	:arrow_up:
pytmc/bin/pragmalint.py	83.76% <0%> (+3.21%)	:arrow_up:

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[n-wbrown]

Should close #158 for real this time.