\target after \row generates invalid HTML

A \target directly after a \row is generated as a <span> within a <tr>.
This is invalid HTML, so these link targets are relocated to the start
of the table by both Chrome and Firefox.

A noticed this in the AppMan docs, so I thought it may just fix it here (see https://codereview.qt-project.org/c/qt/qtapplicationmanager/+/491233), but then I found out that even qtbase has ton of these.

You can find all locations via: git grep -B 1 \\\\target | grep \\\\row