feature 524 / added alignment reset and multi-select.

[PhotoNomad0]

Describe what your pull request addresses

• [ ] implements multi-select in alignment wordbank
• [ ] also implements: https://github.com/unfoldingWord/gateway-edit/issues/569
• [ ] add support for clearing all alignments
• [ ] add support for multiple selections with shift-click

Test Instructions

• [ ] test with https://deploy-preview-576--gateway-edit.netlify.app
• [ ] test aligner support for clearing all alignments
• [ ] test aligner support for multiple selections in wordbank with shift-click
• [ ] make sure saving still works after resets of alignments

[codecov[bot]]

Codecov Report

Merging #576 (ec7704f) into develop (621ea8c) will decrease coverage by 1.41%. The diff coverage is 35.29%.

:exclamation: Current head ec7704f differs from pull request most recent head 3e884ce. Consider uploading reports for the commit 3e884ce to get more accurate results

@@             Coverage Diff             @@
##           develop     #576      +/-   ##
===========================================
- Coverage    51.55%   50.15%   -1.41%     
===========================================
  Files           43       43              
  Lines         1315     1330      +15     
===========================================
- Hits           678      667      -11     
- Misses         637      663      +26     

Files	Coverage Δ
src/components/WordAlignerDialog.js	40.47% <35.29%> (-3.97%)	:arrow_down:

... and 3 files with indirect coverage changes

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