reduce calls to _render() caused by jumpTo()

[NathanMOlson]

1. Set fadeDuration to 0.
2. Don't call _render() on 'move' event
3. On 'moveend' event, only call _render() if all tiles are loaded
4. On 'data' event, only call _render() if all tiles are loaded
5. If _placementDirty is true, a re-render will be required. In this case, return from _render() early, before the expensive call to painter.render()

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.41%. Comparing base (86ed382) to head (890ea01).

❗ There is a different number of reports uploaded between BASE (86ed382) and HEAD (890ea01). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (86ed382)	HEAD (890ea01)
	9	8

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4852       +/-   ##
===========================================
- Coverage   87.66%   64.41%   -23.25%     
===========================================
  Files         265      265               
  Lines       37937    37953       +16     
  Branches     2407     1562      -845     
===========================================
- Hits        33257    24447     -8810     
- Misses       3608    12598     +8990     
+ Partials     1072      908      -164     

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[NathanMOlson]

Oops, I intended to make this PR in my own fork. This is not intended to be merged.

Moved to: NathanMOlson#2