Prevent moving the selection into a hr by clicking on it in FF.
Merge branch 'commercial-hotfix' of github.com:alohaeditor/Aloha-Editor into commercial-hotfix

Conflicts:
	build/hotfix-changelog.md
Add new plugin autoparagraph.
Merge pull request #967 from npomaroli/commercial-hotfix

Prevent moving the selection into a hr by clicking on it in FF.