[Bug] `PlotContainer.render` crashes when `center:true` and table does not have geospatial data

Describe the bug
Loading a table that does not have geospatial columns results in bounds being null which crashes the PlotContainer

The fix should just be a matter of adding a bounds check before calling geoViewport.viewport (and maybe adding a test case for bounds=null.

      const bounds = findMapBounds(mapFields.layers);
      const width = size.width / (isSplit ? 2 : 1);
      const height = size.height;
      const scale = this.mapScaleSelector(this.props);
      const newMapState = {
        ...mapState,
        width,
        height,
        zoom: mapState.zoom + (Math.log2(scale) || 0)
      };
      if (exportImageSetting.center) {
        const {center, zoom} = exportImageSetting.center
          ? geoViewport.viewport(bounds, [width, height])
          : {center: [mapState.longitude, mapState.latitude], zoom: mapState.zoom};

To Reproduce
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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
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