UI: Add Info When No Items In Drilldown

[kergomard]

Hi everybody
@oliversamoila noticed that we are currently not showing any information in a Drilldown that is empty, so I changed that.

If this PR is merged, if you filter everything from a Drilldown you will see:

Thanks and best,
@kergomard

[Amstutz]

Hi @kergomard

Thx a lot for tackling this!

First a non-actionable note, I personally do not like property promotion. However, they are already in use and my colleagues do not mind. So I won't either.

Change or shortly explain why not:

• No Item Text: You put the no item text directly on the components object. I would regard this rather as just a rendering detail, and would therefore rather opt to just pack it directly into the rendering. This has the additional advantage, that the lng dep. is already available there.

Thx a lot
@Amstutz in consultation with @klees and @thibsy

[kergomard]

Hi @Amstutz , hi all
Thank you very much for the review.
You are completely right: I moved text to the renderer.
I also removed the property promotion as I don't need to touch this class anymore. Personally I'm a big fan, as I think that it improves readability hugely and it reduces the potential for errors.

Thanks again and best,
@kergomard

[Amstutz]

Thx a lot!