Accessibility: Tags keyboard navigation and OnPush change detection

[timotheeguerin]

fix #1420

[codecov]

Codecov Report

Merging #1421 into master will increase coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #1421      +/-   ##
=========================================
+ Coverage   53.64%   53.7%   +0.06%     
=========================================
  Files        1023    1025       +2     
  Lines       24307   24333      +26     
  Branches     2800    2800              
=========================================
+ Hits        13040   13069      +29     
+ Misses      11267   11264       -3

Impacted Files	Coverage Δ
...batch-flask/ui/tags/tag-list/tag-list.component.ts	100% <100%> (ø)
src/@batch-flask/ui/tags/tags.module.ts	100% <100%> (ø)	⬆️
src/@batch-flask/ui/tags/tags.component.ts	95.74% <100%> (+8.56%)	⬆️
src/@batch-flask/ui/tags/tag-list/index.ts	100% <100%> (ø)

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