Global string setting to replace "Unknown" or "Unavailable" values

[GitHubGoody]

It's unavoidable that some sensors become unknown or unavailable. When that happens, one of those 7 to 11 character strings takes the place of a 1-3 character string (e.g. a battery level %) usually disrupting the visual depiction of that card/element. I would like an ability to set a global string that would take the place of those default strings in situations like these.

For example, instead of Unknown, I might set "?" and instead of Unavailable, a "!"

Of course, people could leave the default values if that's what they prefer. I know I could put these as additional conditional statements in my templates, but something like what I describe above seems like a better solution.

[BoneheadFraggle]

I like that, and would like to add another option, to make it just "blank".

I would like the option to have my dashboards show
"Humidity Living room %"
rather than today's
"Humidity Livingroom NaN %"

I think it is visually nicer, and you still get the possibility to fetch unavailable sensors by triggering on "not greater than -100"

[GitHubGoody]

If you like this idea, I think you're also supposed to Upvote it.</kind voice> ;-)