UI: Add title label to title fields

[mountainash]

In the attached screenshot from the creation of a new Layout article type, it's not obvious what the 3rd and 5th fields are for. They are for the "title" of the translations, but it's not obvious (esp. as the "Slug" label looks equidistant between it's field (below) and the field above).

I suggest adding a "Title" label above the title fields and putting a little bit more spaces between the input and the next groups label.

[aheinze]

Fixed. Will be released in 2.3.5 👍