Numerous bug fixes

[Integral]

Number of bugfixes related to footnotes:

• [x] Footnotes removing are not updating xrefs properly #1222
• [x] Can't delete table with footnote refs #1221
• [x] Footnotes sometimes are in wrong order #1223
• [x] Typo in New > Figure Package menu #1226
• [x] Figure scoped supplementary file is not exporting #1227

[codecov[bot]]

Codecov Report

Merging #1225 into master will decrease coverage by 0.03%. The diff coverage is 96%.

@@            Coverage Diff             @@
##           master    #1225      +/-   ##
==========================================
- Coverage   86.82%   86.78%   -0.04%     
==========================================
  Files         400      400              
  Lines        9000     8998       -2     
==========================================
- Hits         7814     7809       -5     
- Misses       1186     1189       +3

Impacted Files	Coverage Δ
src/article/converter/r2t/FootnoteConverter.js	100% <ø> (ø)	:arrow_up:
src/article/editor/EditorPackage.js	100% <ø> (ø)	:arrow_up:
src/article/converter/r2t/FigurePanelConverter.js	98.71% <100%> (+2.56%)	:arrow_up:
src/article/metadata/MetadataPackage.js	100% <100%> (ø)	:arrow_up:
src/article/shared/TableFootnoteManager.js	87.5% <100%> (ø)	:arrow_up:
src/article/metadata/RemoveReferenceCommand.js	100% <100%> (ø)	:arrow_up:
src/article/shared/RemoveItemCommand.js	100% <100%> (ø)
src/article/ArticleAPI.js	96.8% <88.88%> (-0.41%)	:arrow_down:
src/article/shared/AbstractCitationManager.js	88.73% <0%> (-5.64%)	:arrow_down:

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[obuchtala]

Looking good.