[8.165][BUG][FIXED] Shell Access cosmetic

Hi All

The error message provided when someone tries to add a SSH key is not useful

Thanks

Astaro Beta Report

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Version: 8.165

Type: BUG

State: TESTED/FIXED

Reporter: wingman+

Contributor: 

MantisID: 18204

Target version: 8.171

Fixed in version: 8.171

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