Add dialogs for editing Project and Form properties

[KeyWorksRW]

Description:

As the number of properties for both the Project file and Form classes continues to grow, it's increasingly going to be harder for someone to find the property they want to change. While the list of properties always needs to be shown for those who know exactly where the property is that they want to change, having an alternate method of changing those properties could be very helpful to more quickly locate the desired property.

I'm thinking in particular of a tabbed dialog. Tabs such as General, C++, Python, XRC for the Project, and adding Settings for Forms. For consistency, we could even go further and display a dialog for all controls as well -- this would be dynamically generated, much as the property grid gets dynamically generated.