Merge branch 'master' into major
Allow blocking automatic insertion by canceling edit.
Introduced widgetsRepo#finalizeCreation.
Merge branch 't/10936' into major
Fix disappearing content on iFrame when outer text in modify. Use load event.
Support for custom document.domain in IE.
Fix IE9 MathJax crash on undo.
Add comments.
Add data-cke-survive to keep element event if it is empty.
Fix FF & IE9 problem with copy & paste. Iframe is created in widget init.
Check if 'data-cke-survive' equals 'true'.
Change regex, which remove iframe, to be non greedy.
Change regexp, remove only iframes inside mathjax spans.
Add loading indicator.