Bump ForgeHg 0.1.18 - unicode path handling

Signed-off-by: Tim Van Steenburgh <tvansteenburgh@gmail.com>
[#6883] Fixed tracker export using "nobody" as assigned_to for unassigned tickets

Signed-off-by: Cory Johns <cjohns@slashdotmedia.com>
only generate ticket edit form when edit link is there to use it
[#6788] Fixed errant tracker config keys causing error on 2nd-gen reimport

Signed-off-by: Cory Johns <cjohns@slashdotmedia.com>