Improve scrolling performance on tvOS

[zenangst]

This applies the same kind of optimization that we have on iOS, it improves scrolling performance when using multiple components.

[codecov[bot]]

Codecov Report

Merging #819 into master will decrease coverage by 0.9%. The diff coverage is 54.16%.

@@            Coverage Diff             @@
##           master     #819      +/-   ##
==========================================
- Coverage   84.81%   83.91%   -0.91%     
==========================================
  Files         152      152              
  Lines       10538    10548      +10     
==========================================
- Hits         8938     8851      -87     
- Misses       1600     1697      +97

Flag	Coverage Δ
#ios	82.71% <54.16%> (-0.14%)	:arrow_down:
#osx	86.67% <ø> (ø)	:arrow_up:
#tvos	81.88% <54.16%> (+7.89%)	:arrow_up:

Impacted Files	Coverage Δ
Sources/Shared/Structs/Configuration.swift	85.71% <ø> (ø)	:arrow_up:
Sources/iOS/Classes/SpotsController.swift	63.25% <0%> (-2.79%)	:arrow_down:
Sources/iOS/Classes/ComponentFlowLayout.swift	68.05% <100%> (+2.55%)	:arrow_up:
Sources/iOS/Classes/Component.swift	84.67% <80%> (-5.64%)	:arrow_down:
SpotsTests/tvOS/SpotsScrollViewTVOSTests.swift	0% <0%> (-100%)	:arrow_down:
SpotsTests/tvOS/SpotsControllerTVOSTests.swift	0% <0%> (-100%)	:arrow_down:
...potsTests/Shared/ComponentFocusDelegateTests.swift	0% <0%> (-86.37%)	:arrow_down:
SpotsTests/iOS/ComponentDelegateiOSTests.swift	81.01% <0%> (-3.8%)	:arrow_down:
...urces/iOS/Extensions/Delegate+iOS+Extensions.swift	88.88% <0%> (-1.24%)	:arrow_down:
... and 1 more

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[onmyway133]

@zenangst 👍