<map-feature> with no child <map-properties> is not focusable, does not display <map-featurecaption>

[prushforth]

Steps to reproduce:

Put this layer on index.html in dist (note the projection must match that of the map):

    <layer- label="copied data" checked>
      <map-meta name="projection" content="CBMTILE"></map-meta>
      <map-feature>
        <map-featurecaption>Copied location</map-featurecaption>
     <!--   <map-properties><h2>properties</h2></map-properties> -->
        <map-geometry cs="pcrs">
          <map-point>
            <map-coordinates>-46306 707682</map-coordinates>
          </map-point>
        </map-geometry>
      </map-feature>      
    </layer->

Tab to focus map
Tab focuses zoom control

Expected result:
Tab after focus on map should focus feature