Much, much smarter way of finding the Tags

The old way manually implemented a parser, where it could simply call a
regexp (or, in my case, a QChar) that will split the QString into many, to
find the beginning and end of the strings on the tags.

This patch also fixes a Qt5 off-by-one bug on the tag Visualization.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>