"format: invert" support for entities

[ildar170975]

Is it possible to implement a "format: invert" for entities?
"Invert" means "show a negative value as a positive one".

Example:
"Netdata" integration provides negative values for some statistical data like "HDD writes", "Network outgoing speed" etc.
It is very useful to have this data negative - on a graph (mini-graph-card, history-graph) the "HDD reads" & "HDD writes" (as well as "Net in", "Net out") one graph will be shown above X-axis, second one - above:

But it is not convenient to have these negative values on Entities card.
That is why it would be great to display these negative values inverted.

[benct]

Sorry for taking so long.. added invert formatting option in version 4.4.0 🙂

[ildar170975]

Thank you very much!