Fixed issue in commutation of different content changes. Also fixed bug that new reversed changes weren't add to list of all changes.

Fixed bug with adding a new paragraphs in the main document. Fixed bug with loading reversed changes for client who made this changes. Added a test hotkey for Undo in fast collaborative.

v4.2.1

* 'develop' of https://github.com/ONLYOFFICE/sdkjs:
  fix Bug 33612
  fix bug 33604
  🐛 fix bug 33602
  check Refresh_RecalcData
  correcting plotArea rect in scatter charts
  font style with null properties
  Fixed bugs with last commit.
  fix set localization formulas
  bug 32901 change link type
  fix get union for sparklines
  Function asc_AddPageCount added to export.
  fix Bug 33284
  Function asc_AddPageCount added to export.
  fix bug 33605

Hotfix/v4.2.1

change link type