HaikuDepot: Use B_USE_WINDOW_INSETS in login window
HaikuDepot: Display check box to deactivate rating

... if a rating already exists for the given package and version.
HaikuDepot: Rating and login window have no system names.
HaikuDepot: Added WebAppInterface getter to Model
HaikuDepot: Implemented creating and updating ratings...

... in WebAppInterface. Both types of requests fail at the moment.
Creating a rating failes due to invalid authentication (I thought I am doing
it correctly), updating fails with a NullPointerException on the server.
HaikuDepot: Fixed missing space in error alert.
HaikuDepot: Implemented creating/updating ratings...

... from the RatePackageWindow. It does not work yet, the errors
are reported. To be investigated...