[itsme]

New group name:
"Name für neue %1$s" will not work
You will be fooled by German grammar (the tab titles are plural, "Name für ..." should use singular and the grammatical gender has to be considered).
Correct would be
"Name für neue Sammlung" (die Sammlung, feminin)
"Name für neue Setliste"
"Name für neuen Quell-Typ" (der Quell-Typ, masculin)
"Name für neues Album" (das Album, neuter)
You could tweak it with having strings like "s Album". I doubt that it is worth the effort and how that needs to be handled in other languages.
"%1$s - neuer Name"
"%1$s - Name eingeben"
"%1$s - neuen Namen eingeben"
would work, not as elegant, but correct.
Replacing %1$s with both "Sammlungen", plural as on the tab title or "Sammlung", singular, would be correct
I would prefer e.g. "Sammlungen - neuen Namen eingeben", there's room enough for a long text.
@BRX: what do you think?