Scenario
I have a rating of Hot, Warm, Cold.
I only want an indicator on Hot or Warm.
I set both Hot and Warm up as Extensions, and they display fine.
But Cold shows as a "ghost indicator" (text and no colours).
I tried entering an Extension as Rating Other with a Priority of 99 and contains text as * and that doesn't work (the * must be literal, not wildcard).
Entering a FALSE value doesn't work because Cold is still a valid value.
An "Other" option is needed to supress the Indicator.
Another Scenario
I have a Picklist of Active with values Yes or No (not a good field setup choice at all though).
I want an indicator to appear for Contains Yes. but no Indicator to appear for Contains No (or any other option that might be added later, or blank).
I can "work around" this by creating a boolean Formula Field for Is Active, but the excellent point of the Extensions is to not have to create a heap of formula fields.
NOTE: We can set the default Icon to show in all cases, but sometimes you don't want to show an icon at all.
Also, I don't want to have to enter an Extension for each and every picklist value as it is too hard to maintain when I add more picklist values. So I just want an "for anything else, suppress the indicator" option for Extensions.