Signed-off-by: Conrad Zelck <git@simpel.cc>

Signed-off-by: Conrad Zelck <git@simpel.cc>

To increase accessibility.

Signed-off-by: Conrad Zelck <git@simpel.cc>

Signed-off-by: Conrad Zelck <git@simpel.cc>

As target="_blank" offers some security problems there is a fix adding
rel="noopener noreferrer" too.

Signed-off-by: Conrad Zelck <git@simpel.cc>

Both buttons are no type submit but that is defined aas default. So I
wrote type="button" now to be right according html5.

Signed-off-by: Conrad Zelck <git@simpel.cc>

Signed-off-by: Conrad Zelck <git@simpel.cc>

I wrote a sentence inside "How to sort" to described what happens if
option "output unique lines only" is set.

Signed-off-by: Conrad Zelck <git@simpel.cc>

Buttons said 'unique' too. But after making the lines unique as an
option to check it had to be removed from the button labels. Had to be
removed from the details 'How to sort' too.

Signed-off-by: Conrad Zelck <git@simpel.cc>