On pages like the "Hotspots" and "Distance" graphs, change the most recent icon from an 'X' when value is unknown to a '?'

[DeflateAwning]

On the Hotspot and Distance graph pages, the most recent transmission shows as an 'X' because there is no way to know that data until it is received in the next communication cycle.

Instead of showing as "0 hotspots saw the last packet", it would be better to show is as a "?", which indicates that "the device does not know how many hotspots saw the last packet, yet"

[disk91]

X means that the frame has been lost

[DeflateAwning]

It doesn't always mean the frame has been lost. The X changes to a count upon the feedback being received from the server. Examples include on the Hotspots and Distance graph pages.