Resize column > touch support

[Blackbaud-AlexKingman]

Addresses #40

[codecov]

Codecov Report

Merging #57 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
+ Coverage   99.81%   99.81%   +<.01%     
==========================================
  Files          10       10              
  Lines         550      555       +5     
  Branches       85       85              
==========================================
+ Hits          549      554       +5     
  Misses          1        1

Impacted Files	Coverage Δ
src/app/public/modules/grid/grid.component.ts	100% <100%> (ø)	⬆️

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[Blackbaud-TrevorBurch]

@Blackbaud-AlexKingman should we have some unit tests around this that looks for the touch event instead of the mouse event like previous unit tests would have? That way if we accidentally break this in the future we will now about it.