Fixed the changeHeadingToParagraph test, which was broken in revision 1180. We don't want the SPAN that surrounds a heading number automatically removed, because this removal is supposed to take place in headingRemoved(). Previously, the fact that we had set a style attribute on the SPAN element, making it red for debugging purposes, meant that removePropertiesSingle() was leaving it there. After removing the code that set this style attribute however, it was just considered a normal span. Now in removePropertiesSingle() we check the class name and if it begins with Keys.UXWRITE_PREFIX (currently "-uxwrite-"), it is left there.
Fixed the changeHeadingToParagraph test, which was broken in revision 1180. We don't want
the SPAN that surrounds a heading number automatically removed, because this removal is
supposed to take place in headingRemoved(). Previously, the fact that we had set a style
attribute on the SPAN element, making it red for debugging purposes, meant that
removePropertiesSingle() was leaving it there. After removing the code that set this
style attribute however, it was just considered a normal span. Now in
removePropertiesSingle() we check the class name and if it begins with Keys.UXWRITE_PREFIX
(currently "-uxwrite-"), it is left there.

corinthia/corinthia-editor,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editorlib,corinthia/corinthia-editorlib,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editor