Preserve removals before inserts

[Shatur]

To avoid inconsistent triggers behavior between the server and client. Fixes #458.

First two commits just adjust related variable names. The actual fix in the third one.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.30%. Comparing base (1e42c4f) to head (5243ae9).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #462      +/-   ##
==========================================
- Coverage   80.33%   80.30%   -0.04%     
==========================================
  Files          53       53              
  Lines        2797     2797              
==========================================
- Hits         2247     2246       -1     
- Misses        550      551       +1     

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[UkoeHB]

What if the server does remove-insert-remove?

[Shatur]

What if the server does remove-insert-remove?

Will be only removed since the component won't exist when we iterate over the world to collect changes. We buffer only removals. Probably worth mentioning things like this somewhere in the docs 🤔