message: fix the nav bar when looking at the docs menu on mobile
  some entries aren't nested and therefore the mobile dropdown wasn't making them clickable
diff: <option value="/docs" {{if .IsHome}}selected{{end}}>Overview</option>
  {{- range .Site.Menus.docs }}
  {{ $menuArea := .Identifier}}
  + {{ $isCurrentPage := eq .URL $current.RelPermalink }}
  - <optgroup label="{{ $menuArea }}">
  + {{- if ne .URL "" -}}
  + {{ $isCurrentPage := eq .URL $current.RelPermalink }}
  + <option value="{{.URL}}" {{ if $isCurrentPage }}selected{{end}}>{{ .Name }}</option>
  + {{- else -}}
  + <optgroup label="{{ $menuArea }}"></optgroup>
  {{- range ((where $current.Site.RegularPages "Params.area" "==" $menuArea).ByParam "menuPosition") }}
  {{ $isCurrentPage := eq .RelPermalink $current.RelPermalink }}
  <option value="{{.RelPermalink}}" {{ if $isCurrentPage }}selected{{end}}>{{ .Title }}</option>
  - {{ end }}
  </optgroup>
  + {{- end -}}
  + {{ end }}
  {{- end }}
  </select>
  </nav>
  \ No newline at end of file
  