Fixed error message in ReportMypackage form

Fixes #1750 . The error message is updated to be generic. Also the "Required" icon that we show in login/signin pages is added to the ContactOwners/ReportAbuse Forms.

Tested the following scenarios manually : 

1. ContactOwner and ContactSupport while logged in as package owner.
2. ReportAbuse and ContactOwner without logging in.
3. ReportAbuse and ContactOwner while logged in as a normal user ( who is not the owner of the current package).