WIP WEBDEV-4532: Added icon button hover, active, focus effects

[nsharma123]

https://webarchive.jira.com/browse/WEBDEV-4532

[codecov[bot]]

Codecov Report

Merging #801 (b893906) into master (9923483) will increase coverage by 0.69%. The diff coverage is 83.72%.

:exclamation: Current head b893906 differs from pull request most recent head 85d1ad7. Consider uploading reports for the commit 85d1ad7 to get more accurate results

@@            Coverage Diff             @@
##           master     #801      +/-   ##
==========================================
+ Coverage   64.94%   65.64%   +0.69%     
==========================================
  Files          58       58              
  Lines        4639     4657      +18     
  Branches      728      729       +1     
==========================================
+ Hits         3013     3057      +44     
+ Misses       1380     1353      -27     
- Partials      246      247       +1     

Impacted Files	Coverage Δ
src/plugins/search/plugin.search.js	59.89% <ø> (ø)
src/BookNavigator/downloads/downloads.js	77.77% <50.00%> (+71.52%)	:arrow_up:
src/BookNavigator/BookNavigator.js	65.75% <60.00%> (+1.66%)	:arrow_up:
src/BookReader/Navbar/Navbar.js	84.68% <83.33%> (-0.08%)	:arrow_down:
src/BookNavigator/volumes/volumes-provider.js	87.50% <84.21%> (+4.16%)	:arrow_up:
src/BookNavigator/downloads/downloads-provider.js	100.00% <100.00%> (+58.33%)	:arrow_up:

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