Fix removing blockquote when ta-default-wrap=br #1416
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This replaces #1385 due to merge errors.
When blockquote is removed when ta-default-wrap=br, it results in removal of the text. The text is not actually removed, it is inside an opening and closing BR tag which makes the text seem to be removed in some browsers. The opening and closing BR tags are a problem in quite a few places withing textAngular, due to treating BR like a P or DIV element which has opening and closing tags.
This also includes updated tests, for testing blockquote removal when ta-default-wrap=br