Normalize styles because IE8 use uppercased properties.
Trim whitespaces, so data processor is not creating data-cke-markers breaking 'single widget pasted' check.
Strip expandos in data processor's data filter.
Inputs are marked with contenteditable=false flags, so filters for them need to be applied to non-editable content as well.
Do not auto initialize widgets in temporary elements like copybin.
Marked copybin and pastebin with data-cke-temp.
Fixed IE8 issue, when clicking scrollbar would throw an exception.
Changelog entry.
Merge branch 't/10887' into major