Allow user to sort uplinks table

[jthiller]

Current ordering of uplinks list (which is the order of uplinks received) is currently opaque to the user. This issue proposes allowing the user to sort the uplinks table in order to better understand best/worst signal, closest/furthest hotspot, etc.

Sorting would be controlled by clicking the table head for the respective column.

ex: Distance column is shown sorted closest to furthest, with focus/hover state represented for non-touch devices.