Update CHANGELOG.md (#914)

CHANGELOG.md

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 # Change log
 
+## 7.1.0
+
+### New Features
+
+#### All Editors
+
+* Use system scaling option for screen on Windows 10 and later
+* New menu for inserting shapes (with list of recent used)
+* Ability to edit points of a selected shapes
+* Ability to open new diagram types: Pyramid, Bar (Pyramid), vertical and horizontal cylinders, vertical and horizontal cones
+* Ability to crop a selected image to shape
+* Ability to see your file protection password when entering it
+* Support for SmartArt objects without converting into a group of objects
+* New UI language on Windows/Linux (Galego/Galician)
+* New UI languages on macOS (Belarusian, Bulgarian, Catalan, Danish, Dutch, Finnish, Galego, Greek, Hungarian, Indonesian, Japanese, Korean, Latvian, Norwegian, Romanian, Slovene, Swedish, Turkish, Ukrainian, Vietnamese, Lao)
+* Gradient fill icon shows the chosen colors
+
+#### Document Editor
+
+* Ability to convert PDF/XPS files into editable files
+* New toolbar tab: View
+* Ability to accept/reject changes from the context menu
+* Ability to use special symbols when searching within documents
+* Ability to add a period with a double-space
+* Add Chinese/Japanese/Italian language to Watermark settings
+* New viewer for PDF, XPS, DJVU files with major performance improvements All operations are performed on the client side.
+* Ability to use the Page Thumbnails panel and to display the document's contents on the left sidebar for PDF files
+* Support for external and internal links in PDF opening
+* Ability to use Hand/Select tools in PDF viewer
+* The Document Info section of the Data tab contains information about PDF, XPS, DJVU files
+
+#### Spreadsheet Editor
+
+* Using a built-in preview panel before printing out a spreadsheet
+* New view settings: Combine sheet and status bars, Always show toolbar, Interface theme, Show frozen panes shadow
+* New currencies as per ISO 4217 without needing to change the locale
+* Using tips when working with formulas for tables
+* Ability to set a text qualifier when importing text from TXT/CSV
+* Support for XLSB files for opening
+
+#### Presentation Editor
+
+* New toolbar tabs: Animation, View
+* Animations can be added to the presentation
+* Ability to duplicate slides using the Add slide menu
+* Ability to move a slide to beginning/end using a slide context menu
+* Ability to add a period with double-space
+
+#### Forms
+
+* Ability to zoom a form
+
+### Fixes
+
+* All components received countless fixes
+
 ## 7.0.2
 
 ### Fixes