Node creation dialog element labels translation not working

[DrillSergeant]

Seems labels with value "i18n" are not translated. Instead "i18n" is used as a fixed value.

Steps to reproduce:

• Add configuration to a node that adds an element to the node creation dialog:

    creationDialog:
      elements:
        date:
          type: DateTime
          ui:
            label: i18n
            editor: 'Neos.Neos/Inspector/Editors/DateTimeEditor'
            editorOptions:
              format: 'd.m.Y'

• Create a node (of the type you just added the creation dialog element for)

Expected result:
I see the element in the dialog with a translated label (or at least the i18n-key as fallback if no translation exists yet.

Actual result:
The string "i18n" is used as label:

[lorenzulrich]

Just to let everyone know: I'm currently working on this. Most of it needs to be adapted inside neos/neos.

[lorenzulrich]

I added this functionality for the label of the creationDialog elements. I'm not sure if the syntax inside the XLF file is OK, e.g. creationDialog.title. I think it's not too bad because it follows the known pattern properties.foo, groups.bar etc.. In contrast to creationDialog, they are in plural form, so an alternative - which is a little clumsy IMO - would be creationDialogElements.

[lorenzulrich]

At the same time and as an example I made the title property of the default Document node type make use of the i18n functionality. I intentionally used Title instead of Node title because in the inspector of a page, the property is also named Title.