* fix: commonmark example 475 failed
* fix some strong and em commonmark examples failed test
* remove some debug code
* fix: cm example 353
* fix: cm example 387
* remove ununsed codes
* use \s to replace unicode whitespace array
* fix 3 atx heading examples
* fix setext heading failed examples and image alt examples
* fix: example 520 and 521
* feat: add front menu
* update changelog
* feat: add short cut of paragraph edit
* fix location bug of submenu
* update checkbox style in editor
* update selected background color
* update KEYBINDINGS.md
* Bullet to ordered list issue:
* emit change event after control paragraph
* fix: marked parse error
* disable table, front-matter and horizontal line in paragraph turn into, and fixed paragraph turn into html and math
* fix unwanted space before text paragraph when heading turn into text paragraph
* fix error when turn heading to paragraph
* put front menu on the left on front icon
* update readme
* if the selection span in two lnes, disable paragraph turn into heading
* markedjs#1239, markedjs#1262: Escapedpipes
* markedjs#1303: add hard line break when backslash at EOL
* markedjs#1135: update the list of markdown escapes, per commonmark
* markedjs#1224: fix unsafe heading regex
* markedjs#1023: new blockquote rule: match any paragraph-like content up to next line
* markedjs#1245: GFM table compliance
* markedjs#1013, markedjs#1181 fix backticks in inline code and em
* markedjs#1351: fix emphasis closing by single _
* markedjs#1034: make autolinks compliant
* markedjs#1387: fix language identifier parsing
* Restore table escape characters