Add indicators on the item´s window property when an item is "Unstyled"

[LautaroL20]

It would be nice to display the items once the apropiated Style is selected.

[vrad-exe]

And maybe also add an option to hide unstyled items.

[LautaroL20]

I already suggested that, here: #449

[Konclan]

This would be really helpful, an easy suggestion would be to add the definition of a supported style in the item's property config file. Trying to automatically define it might be bad because some items work in multiple styles without needed additional configs for each style.

[Konclan]

Of course, there would need to be an option to disable the indicator because of user-created styles which would make every item show up as incompatible except for items that work in any style which could just have an "any" tag

[TeamSpen210]

Not quite, those cases are already handled. You can add a "base" command in a style to indicate that another style is acceptable if a specific version isn't available. 1970s and 1980s specify the previous decade, and that works fine. There's a "unstyled" flag on items which suppresses the errors entirely for logic gates and the like.