Fix #168 sidebar title shows.  -has-issues

1.  The `sidebarheader` briefly shows.
2.  *all sidebars* in a hotdish window will be shown without titles.

If we want to get more aggro on this, we have to remove the element from
the sidebar on construction, before show.
Merge pull request #168 from gregglind/b168-sidebartitle

Remove title bar from hotdish sidebar