Revert "Remove unneeded saving a keychain entry right after"

This reverts commit e8126e68cef51d7b43b42b65ce10b21439c832b8.

src/main/java/org/cryptomator/ui/keyloading/masterkeyfile/MasterkeyFileLoadingStrategy.java

@@ -56,7 +56,7 @@ public class MasterkeyFileLoadingStrategy implements KeyLoadingStrategy {
 		this.keychain = keychain;
 		this.resourceBundle = resourceBundle;
 		this.passphrase = savedPassphrase.map(Passphrase::new).orElse(null);
-		this.savePassphrase = false;
+		this.savePassphrase = savedPassphrase.isPresent();
 	}
 
 	@Override