Synchronize timers between multiple users

[akhenry]

Closes #6880

Describe your changes:

Thanks to @jvigliotta and @ozyx for doing most of the work here, allowing me to swoop in and claim the credit.

• Simplified the way timers calculate their delta to remove the possibility of timers getting out of sync.
• Synchronize timer object model using a * listener. This is gross, but I think we were hitting an issue with properties on proxied objects being replaced with non-proxied versions when a refresh happens

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Author Checklist

• Changes address original issue?
• Tests included and/or updated with changes?
• Command line build passes?
• Has this been smoke tested?
• Testing instructions included in associated issue OR is this a dependency/testcase change?

Reviewer Checklist

• Changes appear to address issue?
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[deploysentinel]

Current Playwright Test Results Summary

✅ 14 Passing - ⚠️ 1 Flaky

Run may still be in progress, this comment will be updated as current testing workflow or job completes...

(Last updated on 08/02/2023 11:20:26pm UTC)

Run Details

Running Workflow e2e-couchdb on Github Actions

Commit: 6358b9c

Started: 08/02/2023 11:17:36pm UTC

⚠️ Flakes

📄   functional/plugins/displayLayout/displayLayout.e2e.spec.js • 1 Flake

Test Case Results

Test Case	Last 7 days Failures	Last 7 days Flakes
Display Layout When multiple plots are contained in a layout, we only ask for annotations once @couchdb Retry 1 • Initial Attempt	9.84% (6) 6 / 61 runs failed over last 7 days	19.67% (12) 12 / 61 runs flaked over last 7 days

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Current Playwright Test Results Summary

✅ 131 Passing - ⚠️ 1 Flaky

Run may still be in progress, this comment will be updated as current testing workflow or job completes...

(Last updated on 08/02/2023 11:20:26pm UTC)

Run Details

Running Job e2e-stable on CircleCI

Commit: 6358b9c

Started: 08/02/2023 11:02:31pm UTC

⚠️ Flakes

📄   functional/planning/timelist.e2e.spec.js • 1 Flake

Test Case Results

Test Case	Last 7 days Failures	Last 7 days Flakes
Time List Create a Time List, add a single Plan to it and verify all the activities are displayed with no milliseconds Retry 1 • Initial Attempt	2.16% (3) 3 / 139 runs failed over last 7 days	21.58% (30) 30 / 139 runs flaked over last 7 days

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[codecov]

Codecov Report

Merging #6885 (6358b9c) into master (c630569) will decrease coverage by 0.03%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #6885      +/-   ##
==========================================
- Coverage   48.27%   48.25%   -0.03%     
==========================================
  Files         643      644       +1     
  Lines       25629    25636       +7     
  Branches     2505     2499       -6     
==========================================
- Hits        12373    12371       -2     
- Misses      12783    12789       +6     
- Partials      473      476       +3     

Flag	Coverage Δ		*Carryforward flag
e2e-full	41.99% <ø> (ø)		Carriedforward from 6648113
e2e-stable	56.41% <87.50%> (+0.04%)	⬆️
unit	38.71% <0.00%> (-0.09%)	⬇️

*This pull request uses carry forward flags. Click here to find out more.

Files Changed	Coverage Δ
src/plugins/timer/components/Timer.vue	4.76% <0.00%> (+1.53%)	⬆️
src/utils/throttle.js	87.50% <87.50%> (ø)

... and 10 files with indirect coverage changes

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