To recognize HTML-notes the text was scanned for <div> tags. But
apparently the planner notes do not feature such a thing. Therefore
extend recognition of HTML to <table> tags.
Note we can't use the <html> or <span> tags, because these are
*always* produced by the QTextEdit::toHtml() function.
Fixes#2265
Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
009f47c5dc