Added custom names for widgets in elementspath.
Use standard toolbar in placeholder plugin.
Change button name from Placeholder to CreatePlaceholder to keep backwards compatibility.
Add placeholder icon in documentation.
Changelog entry.
Merge branch 't/11079' into major
CKBuilder version updated to 1.7.2 in build.sh.
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.