JsonWizard: Add page to query for project parameters

Change-Id: I76fad7fd563af6c33b117f1256fa06c22c4240df
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
JsonWizard: Clean up page factories

Improve error reporting and remove useless setup code.

Change-Id: I97e9fba0aa1cf6bb2cba26f70d46d1ba87bbd192
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
JsonWizard: Make TargetSetupPage available to JsonWizards

Change-Id: I59cf128635c28f5cbc45336bef82f63ee5da4e6c
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
TaskWindow: Do not print negative badge counts

Simplify logic for calculating badge count: Just use the number of
rows in the filtered model instead of doing this ourselves. That
should stop the count from ever becoming negative.

Change-Id: I8107f8649ae8178128760d8938412d230fbaf11d
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>