- Fixed AirMode popup so that it disappears when you click on "Help"
  or the Link, Image, or Video insert buttons.
- Fixed the link editor popup so that it disappears when you click on
  the edit icon.
Create summernote-th-TH.js
Merge pull request #601 from mrrtee/master

Create summernote-th-TH.js
Merge pull request #551 from garywiz/master
Merge branch 'garywiz-master'
Update dist file
Update test case for `list`.
Implement `dom` functions for backspace and fixed bullet bugs.
Merge branch 'master' into develop

Conflicts:
	dist/summernote.js
	dist/summernote.min.js
Add isBody function to determine BODY element in dom.js
Add comment for preventing unwanted default range on Firefox
Merge from upstream develop branch