thcrap_configure_simple: change the "add games" button label
thcrap_configure_simple: change the "add games" button label

People who knew the emplacement of their game directory were using
the slow "find games everywhere" button because they didn't understand
what this one does. Hopefully the new label will help them.

thpatch/thcrap,thpatch/thcrap,thpatch/thcrap,thpatch/thcrap,thpatch/thcrap