Use custom texts for the notepad's result messages
This is also split out of !282 (merged)
The messages used are
- "{Decrypted, Decrypted and verified, Verified} the notepad's content"
- "Failed to {decrypt, verify} the notepad's content: <error>"
- "{Signed, Encrypted and signed, Encrypted} the notepad's content"
- "Failed to {sign, encrypt} the notepad's content: <error>"
GnuPG-Bug-ID: 6869
Edited by Tobias Fella