Split translation namespace applications

[f1sh1918]

Is your feature request related to a problem? Please describe.
Currently we have a namespace application which is reserved for keys that will be stored in the database and shouldn't be changed.
Additionally we have a namespace applications which is kind of misleading and hard to distinguish.

Describe the solution you'd like

• separate the namespace in applicationOverview and applicationCard
• also check if in the application namespace are keys that won't be store and move them, f.e. error messages

Describe alternatives you've considered
Find better namings

Additional context
Add any other context or screenshots about the feature request here.