Usage dialog spams screen when you enter a command incorrectly

[kavika13]

When providing bad arguments it would be more helpful to get a short error message rather than spamming the entire screen with the usage help message. Especially something telling the user what they got wrong.

Repro:

1. Run RemCom.exe /user:someusername

Expected: A short message is displayed saying that you've gotten some parameters wrong, or even better, that some specific parameters are missing

Actual: No error message is displayed - just the usage dialog