do not layout `superview.delegate` from presentation layer

[michaelknoch]

Type of change: performance improvement

Motivation (current vs expected behavior)

This is a follow up based on https://github.com/flowkey/UIKit-cross-platform/pull/328.

I noticed that the recursive relayouting only happens when wrapping the layout code in an animation block. During this animation in the learnstep we mutate bounds of the presentation on every frame which then triggers layouting for the parent view for each frame as well. I think this matches the ios behaviour.

Please check if the PR fulfills these requirements

• [ ] Self-review: I am confident this is the simplest and clearest way to achieve the expected behaviour
• [ ] There are no dependencies on other PRs or I have linked dependencies through Zenhub
• [ ] The commit messages are clean and understandable
• [ ] Tests for the changes have been added (for bug fixes / features)

[codecov[bot]]

Codecov Report

Merging #329 (dca8c64) into master (d34725b) will increase coverage by 0.03%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #329      +/-   ##
==========================================
+ Coverage   51.22%   51.25%   +0.03%     
==========================================
  Files          87       87              
  Lines        2899     2899              
==========================================
+ Hits         1485     1486       +1     
+ Misses       1414     1413       -1     

Impacted Files	Coverage Δ
Sources/CALayer+animations.swift	95.23% <100.00%> (ø)
Sources/CALayer.swift	88.88% <100.00%> (+0.74%)	:arrow_up:

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