feat: improved Timeline view (canonicalEvents for hosts)

[ErikBjare]

fixes https://github.com/ActivityWatch/activitywatch/issues/573

TODO

• [ ] Prettier host select
• [ ] Refactor wrapper code for canonicalEvents to share between Timeline and Search
• [ ] Implement category-timeline (wait for another PR?)
• [ ] More?

[codecov[bot]]

Codecov Report

Merging #276 (4f3c418) into master (d477c16) will decrease coverage by 0.02%. The diff coverage is 25.00%.

:exclamation: Current head 4f3c418 differs from pull request most recent head 0010223. Consider uploading reports for the commit 0010223 to get more accurate results

@@            Coverage Diff             @@
##           master     #276      +/-   ##
==========================================
- Coverage   15.86%   15.83%   -0.03%     
==========================================
  Files          22       22              
  Lines        1065     1067       +2     
  Branches      109      109              
==========================================
  Hits          169      169              
- Misses        852      854       +2     
  Partials       44       44              

Impacted Files	Coverage Δ
src/store/modules/buckets.js	10.00% <0.00%> (-0.21%)	:arrow_down:
src/util/classes.ts	81.69% <ø> (ø)
src/util/tooltip.js	0.00% <0.00%> (ø)
src/queries.ts	14.86% <50.00%> (-0.21%)	:arrow_down:

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