Merge branch hotfix/v6.3.1 into master

[papacarlo]

• Fix/bug 50509 (Fix/bug 50509 #1955)
• [se] Fix bug 50489
• [se] Fix bug 50521
• Fix/critical6.3.1 (Fix/critical6.3.1 #1958)
• [se] Fix unnecessary memory consumption in pivot tables
• [bug] Fix bug 50446
• [se] Fix bug 50549
• [se] By bug 50549
• [bug] Fix changes error
• [bug] Fix adding changes to history without point
• [bug] Fix bug 50607
• Fixed pasting text into cells of Api.ReplaceTextSmart() method in SpreadSheet editor
• Changed the used _addChars method to pasteText in Api.ReplaceTextSmart() method.
• [se] Fix bug 50642
• Added methods to export (Added methods to export #1967)
• Fix bug #50604
• Fix bug #50662
• [bug] Escape sheet name for regexp on changing sheet name or on deleting sheets
• [bug] Fix losses ole-objects on opening
• Fix bug #50699
• Skip checking hidden columns in Api.ReplaceTextSmart()
• [bug] Fix bug 50715 ([bug] Fix bug 50715 #1984)
• [se] Fix bug 50717 ([se] Fix bug 50717 #1985)
• [bug][mobile] fix drawing tracks for chart ranges ([bug][mobile] fix drawing tracks for chart ranges #1987)
• [bug] Fix bug 50757
• [bug] Fix bug 50762

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
6 out of 7 committers have signed the CLA.

✅ GoshaZotov
✅ SergeyLuzyanin
✅ K0R0L
✅ konovalovsergey
✅ KhromovNikita
✅ KirillovIlya
❌ catbasilio
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