Improve safe area granularity setup

[ThomasLeblond]

Issue

Hello again 😅!

I have an issue about the constraints management. Top & Bottom are too close and for me this is missing granularity to handle top & bottom separately.

To explain, easier with an image!

Basic behavior with safeAreaLayoutConstraints at true

What's wrong for me? The blank space in bottom.

Basic behavior with safeAreaLayoutConstraints at false

What's wrong for me? The UINavigationBar is no more visible.

The solution. handle top & bottom safe area

🎉

[codecov-commenter]

Codecov Report

Merging #195 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #195   +/-   ##
=======================================
  Coverage   80.11%   80.11%           
=======================================
  Files          11       11           
  Lines         835      835           
=======================================
  Hits          669      669           
  Misses        166      166           

Flag	Coverage Δ
#iOS	43.00% <ø> (ø)
#macOS	80.11% <ø> (ø)
#tvOS	43.00% <ø> (ø)

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[zenangst]

Hey @ThomasLeblond, looks great… let's get this merged! 🏆