Fixed stylings around invalid select fields

[Blackbaud-TrevorBurch]

Addresses: blackbaud/skyux2#2132

[Blackbaud-TrevorBurch]

@Blackbaud-ToddRoberts this will fix the Sky Select Field component

[codecov-io]

Codecov Report

Merging #3 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master       #3      +/-   ##
==========================================
+ Coverage   99.43%   99.43%   +<.01%     
==========================================
  Files           6        6              
  Lines         177      178       +1     
  Branches       24       24              
==========================================
+ Hits          176      177       +1     
  Partials        1        1

Impacted Files	Coverage Δ
...lic/modules/select-field/select-field.component.ts	98.94% <100%> (+0.01%)	⬆️

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[Blackbaud-AlexKingman]

@Blackbaud-TrevorBurch These changes are just for the visual demo. I was expecting to see some styles for the .ng-invalid state. Am I missing something?

[Blackbaud-TrevorBurch]

@Blackbaud-AlexKingman I think I accidentally committed the wrong file. One second

[Blackbaud-TrevorBurch]

@Blackbaud-AlexKingman Fixed. Sorry about that. I think I clicked the wrong scss file when staging things.

[Blackbaud-AlexKingman]

Easy fix. Looks good. Let's make a future work item to take care of some visual tests around invalid states.

[Blackbaud-SteveBrush]

Let's get a visual test to demonstrate this working.