fix: Fix automatic sort of Composite items in fixed containers

[EricRibeiro]

Closes #8

How to test?

Does this PR introduce breaking changes?

No

[ghost]

Hi @the-funnel

You have 3 comments made by bots installed on this repo regarding this pull request. Check them below:

There is 1 critical comment

• 1 comment made by codecov[bot]

  
  

  Codecov Report

  Merging #9 (50a1b30) into master (7c2039d) will decrease coverage by 0.24%.
  The diff coverage is 18.18%.

  ❗ Current head 50a1b30 differs from pull request most recent head 60a5d93. Consider uploading reports for the commit 60a5d93 to get more accurate results
  

  @@Coverage Diff @@
  ## master #9+/- ##
  ==========================================
  - Coverage 95.36% 95.12% -0.25% 
  ==========================================
  Files 230230
  Lines3498 3507 +9 
  Branches954955 +1 
  ==========================================
  Hits 3336 3336
  - Misses161170 +9 
  Partials11

  Impacted Files	Coverage Δ
  ...src/Composite/__utils/useSortBasedOnDOMPosition.ts	54.54% <18.18%> (-37.77%)	⬇️

  ---

  Continue to review full report at Codecov.

  Legend - Click here to learn more
  Δ = absolute <relative> (impact), ø = not affected, ? = missing data
  Powered by Codecov. Last update 7c2039d...60a5d93. Read the comment docs.

There is 1 deploy comment

• 1 comment made by codesandbox[bot]

  
  

  This pull request is automatically built and testable in CodeSandbox.

  To see build info of the built libraries, click here or the icon next to each commit SHA.

  Latest deployment of this branch, based on commit 60a5d93:

  Sandbox	Source
  Reakit	Configuration
  intelligent-snow-7y76s	Issue Composite automatic sort doesn't work on fixed containers #8

There is 1 info comment

• 1 comment made by github-actions[bot]

  
  

  Size Change: +70 B (0%)

  Total Size: 257 kB

  Filename	Size	Change
  packages/reakit/dist/reakit.min.js	36 kB	+70 B (0%)

  ℹ️ View Unchanged

  Filename	Size	Change
  packages/reakit-playground/dist/reakit-playground.min.js	187 kB	0 B
  packages/reakit-system-bootstrap/dist/reakit-system-bootstrap.min.js	19.1 kB	0 B
  packages/reakit-system-palette/dist/reakit-system-palette.min.js	8.85 kB	0 B
  packages/reakit-system/dist/reakit-system.min.js	2.45 kB	0 B
  packages/reakit-utils/dist/reakit-utils.min.js	3.46 kB	0 B

  _{compressed-size-action}

[RonanFelipe]

Thanks for working on this @EricRibeiro! I'll take a look at it this weekend (hopefully).

[mairieli]

I'm also hitting this issue on a regular basis, it can be quite jarring on a long page – thanks for taking on the fix!

[RonanFelipe]

What is the reasoning behind the mutate name?