Restored check for disabling framing on landscape

[mmcc007]

fixes #163

[codecov]

Codecov Report

Merging #166 into master will decrease coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #166      +/-   ##
==========================================
- Coverage   85.72%   85.66%   -0.07%     
==========================================
  Files          16       16              
  Lines        1065     1067       +2     
==========================================
+ Hits          913      914       +1     
- Misses        152      153       +1

Impacted Files	Coverage Δ
lib/src/config.dart	96.25% <100%> (+0.09%)	⬆️
lib/src/validate.dart	80.8% <0%> (-0.8%)	⬇️

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