HB links on region.php

[michihdeu]

1. https://travelmapping.net/user/region.php?u=michih&rg=LIE
2. Click on HB under Statistics by System
3. The browser tab opens showroute.php with an invalid link: https://travelmapping.net/hb/showroute.php?u=michih&rg=LIE&sys=cheh
4. A new browser tab opens system.php with a valid link: https://travelmapping.net/user/system.php?u=michih&sys=cheh&rg=LIE

The HB links on the user page (e.g. https://travelmapping.net/user/?u=michih) open https://travelmapping.net/hb/?u=michih&rg=LIE in the same tab.

I think that 3. + 4. should not happen but https://travelmapping.net/hb/?u=michih&rg=LIE should be opened in the same tab too.