Add hint to also translate a leading space

Having spaces (especially leading or trailing ones) in translatable Strings is probably not a pretty good idea as that is a source of errors. Maybe there can be some refactoring of the setSuffix function to add a space by itself, so it can be left out of the translatable String.

For now I added a hint that this space has to be translated as well. I ran into this because it is not there in the German translation for "row(s)".