Front End Imrovements

Faster switching between properties in a project and among sensors in a project. Flattened sensor hierarchy (see them all at once). Property details and 1st cut of profile data. And the start of sortable tables (for sensors only atm).
Had to think about this for a while - Why not use update-in ? Presumably this is to prevent adding a {key nil} into the map when the key doesn't exist. 

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