Saint Sophia index.html: Hide "Spatial context" button (and metadata) if a surface has no spatial context associated with it (i.e position is empty).

[jonathanwestin]

Some places we won't have spatial context for because they are outside the church and we have not scanned the outside. Since there are only two options, the entire tab-widget should be hidden in those instances.

[TristanBridge]

Safari it seems to pop-out