* Fix#1879: Add .md extension to files created in sidebar if no extension given.
* Use hasMarkdownExtension function everywhere an extension has to be checked.
Allowed markdown extensions are handeled in several places in different ways. Use the hasMarkdownFunction from common/filesystem/paths.js to allow to easily update the allowed extensions when needed.
* add tab scrolling and drag&drop
* fix tab maximal width without side bar
* use dragula instead of vue-draggable
* Update changelog
* fix issues with maximal side bar width
If the side bar is resized more than 50vw then issues occur because the
commited width is not limited to 50vw or if the window is resized.
* reordered tabs after dropping and some improvements
* style opti
* fix#625
* update changelog
* fix error when selection in not in edit area
* also fix double click front icon and error happen
* fix error when click front icons and toolbars of table
* rebase master
* update some codes
* null check in all selection.getCursorRange method
* add maskColor variable
* update roadmap, remove note features
* opti: prevent the duplicated header text error
* scroll error in toc
* delay the change event when init muya, so that the change event listener can handle change event.
* opti: style
* almost finished need last check
* style in table
* clear up some unused codes
* clear up theme hard code
* add no search data picture and new Folder new File
* move search and replace to top of editor
* add: no data image when there is no TOC
* update structure
* little bug fix
* update styles
* update un_draw icons
* update style of editor
* add animation when make open folder collapse.
* remove theme props in editor component, deprecated lightColor and darkColor
* add Ulysses Light
* theme: graphite
* update Ulysses blockquote
* update emoji style
* update titleBar height
* change theme color
* Support macOs dark mode
* update style of tooltip in editor
* update styles
* fix: TOC auto expand all
* patch added
* rewrite notice module
* optimization: show some notification when export html or pdf
* optimization: style of open project button
* little bug fix
* style: uniform titlebar hight to remove some style error
