feat: improve table loading

[wusteven815]

• Adds Improve loading state while seeking table #1865
  • Add a check for if there is still data being loaded in the viewport
  • Add a new loading message if the above is true for >500ms
  • Add state to determine whether startLoading will block the grid or show the cancel button

[wusteven815]

Didn't use a new event, wired it up to IrisGridModelUpdater's updateViewport instead

Switched to events

[codecov]

Codecov Report

Attention: Patch coverage is 52.17391% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 46.11%. Comparing base (b49b506) to head (10e52f8).

Files	Patch %	Lines
packages/iris-grid/src/IrisGrid.tsx	50.00%	6 Missing ⚠️
...ckages/iris-grid/src/IrisGridTableModelTemplate.ts	50.00%	3 Missing ⚠️
packages/iris-grid/src/IrisGridModel.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1898   +/-   ##
=======================================
  Coverage   46.11%   46.11%           
=======================================
  Files         637      637           
  Lines       38054    38077   +23     
  Branches     9620     9626    +6     
=======================================
+ Hits        17549    17561   +12     
- Misses      20452    20463   +11     
  Partials       53       53           

Flag	Coverage Δ
unit	46.11% <52.17%> (+<0.01%)	⬆️

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[mofojed]

iris-grid-loading element that gets loaded blocks all user interaction while scrolling... also, the Cancel button doesn't make sense in this context. It will try and rollback the state of filters etc. which doesn't make sense, and you can't really "cancel" a viewport operation.

Instead, I don't think we should show the cancel button, and we shouldn't stop the user from interacting/scrolling the table either. We just want the loading status in the bottom. So we may need to add another loading state value or something.

[mofojed]

Just some cleanup/suggestions.

If we wanted to get really fancy, we'd keep a list of the pending operations and their type, then decide what loading text/spinner to display at render time based on all the current pending operations. In theory, this could also help us with our rollback before (right now we just rollback to the last loaded state). I think that's all out of scope for right now though, this is good.

[mofojed]

Great work!