Use uptime instead of relative timestamps in console

[mfs12]

To avoid a continuous updates and making the console log unsteady the uptime could be used as a timestamp of console messages. This would have several advantages:

• nothing to update or calculate in the background
• no visual updates in console screen except new message arrive, there for more steady screen
• the added uptime in the top windows would provide interesting additional information to the user

Discussion:

• Either use PanelDue Uptime or Reprap Uptime?

Idea:

• Add uptime to top window frame
• use uptime for console logs

[wilriker]

IMHO uptime does not mean anything to the average user as they would have to remember when the machine was turned on. Especially for long-running industry-machines this can be impossible since they are operated by possibly multiple people and they would have to pass around the information of the last restart.

Either leave it at the current "so much time since this event happened" or get absolute time. But again for long running machines this means we have to also display date somehow and we only have limited screen estate.

While I see the advantages to switch to an another time base I think the current solution is as good as it gets.

If you insist on using uptime, my vote would be for RRF uptime.