When zoomed out the map view keeps reloading all the data and is really slow
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When zoomed out the map view only shows the basic information such as owner and control level - it doesn't show the live preview of the room contents.
However, when panning around (and sometimes when static as well), the map keeps reloading lots of data unneccessarily and it's unbearably slow.
When zoomed out far enough that room contents are not shown, the map view should have very aggressive caching and should not keep reloading the data - nothing is going to change very often at all so don't bother.
We should be able to pan around the map, load all the data into the cache and then be able to pan around the entire map quickly without any more loading.
