Add changelog

CHANGELOG.md

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 # Change log
 
+## 7.5.1
+
+### Fixes
+
+#### All Editors
+
+* Fixed print options (rang) tuning for documents and presentations
+* Fixed opening files with size more than 100MB
+* Fixed some issues with composite input
+
+#### Document Editor
+
+* Fixed crashing if equation contains "&" or "@" symbols [DocumentServer#2455](https://github.com/ONLYOFFICE/DocumentServer/issues/2455)
+* Fixed crashing on transformation of some equations to Professional mode
+* Fixed hanging of the editor after copied data is inserted and equation is added
+* Fixed incorrect painting inserted Text Art
+* Fixed autocorrection of the equation to the power with few itterations
+* Fixed autocorrection "\dots" in the LaTeX mode
+* Fixed equations transformation for brackets with "\open" and "\close"
+* Fixed moving the part of number to the power after transformation
+  of some equations
+* Fixed activation of the option "Allow overlap" in some `DOCX` files
+* Fixed hiding of Shapes styles list when mouse button was pressed longer
+* Fixed image rotation in Microsoft Word after saving and opening some `DOCX` files
+* Improved translations for Chinese (Simplified)
+
+#### Spreadsheet Editor
+
+* Fixed hanging of the editor after image was inserted and operation was canceled
+* Fixed crashing after deleting "`", "^" or "`" symbols on some keyboard layouts
+* Fixed issue when cell border became hidden due to hide row with part of
+  merged cell
+* Fixed apearance of editor gridlines for zoom of the window 200% and more
+* Fixed equation transformation for Linear/Professional mode switching from
+  context menu
+* Fixed print issue for Header/Footer
+* Fixed recalculation of `COUNTIFS` function if arguments were changed
+* Fixed incorrect calculating of `COUNTIFS` function [DocumentServer#2459](https://github.com/ONLYOFFICE/DocumentServer/issues/2459)
+* Fixed displaying data in the Filter window in some `XLSX` files
+* Fixed appearance of the Sheet view mode when `High contrast` theme activated
+* Fixed reseting of the Page fields by Delete key in the Print dialog
+
+#### Presentation Editor
+
+* Fixed error on click Head & Footer in Insert tools panel
+* Fixed crashing in the Reporter mode on changing slide from end demonstration
+* Fixed drawing of first Text Art style
+* Fixed print text in Header or Footer of the slide
+* Fixed hiding of the Animation icon for small size of the editor window
+* Fixed appearance of the Presenter mode buttons when `Same as system` theme
+  activated
+
+#### Forms
+
+* Fixed shifting of radio button in some `OFORM` files
+
+#### PDF Editor
+
+* Fixed saving document through "Save copy"
+* Fixed incorrect processing editor's config (`editorType`)
+* Fixed issue for plugin "Send" when there is no email client installed
+* Fixed issue related to input disabled on creating
+* Fixed issue with loading font when load the PDF editor
+* Fixed drawing highlight in some `PDF` files
+* Fixed moving to the comment when it was clicked at the comment sidebar
+* Fixed hiding of the comment when another page is opened
+* Fixed work of `Esc` key when the fields are being filled out
+* Fixed work of `Alt` + `Page Up` / `Alt` + `Page Down` keyboard shortcuts
+
+#### Security
+* Fixed XSS when adding `Sheet view` name and opening `Version history`
+* Fixed XSS when entering into cell and opening format list
+* Fixed the vulnerability which allows adding a third party image to a document
+  while converting `ODT` to `DOCX`
+
+#### Convert
+
+* Fixed hanging of the editor on opening some `XLSX` files
+* Fixed a conversion error of the `DOCX` file
+* Fixed incorrect page size after converting some `ODT` files to `DOCX` [DocumentServer#2456](https://github.com/ONLYOFFICE/DocumentServer/issues/2456)
+* Fixed the error after resaving some `ODS` files
+* Fixed an image loss after converting some `XML` files to `DOCX`
+* Fixed hang up on opening some `PDF` files created with LibreOffice
+* Fixed the joining of the content in cells after converting some `ODS` files
+* Fixed files corruption after converting some `XLSB` files to `XLSX`
+
 ## 7.5.0
 
 ### New features