Commit d580328 eliminated junk whitespace in the individual line items
for joinable games. Unfortunately, this whitespace was not junk. It
was an undocumented workaround (possibly even unknowing workaround) for
a bug that undercounts the space required to show the header. Restore
the "junk" padding to force the window back to its old width.
Reported-by: Mako88 <https://github.com/dxx-rebirth/dxx-rebirth/issues/374>
Fixes: d580328698 ("Combine direct_join allocations")
ce5d1005dd