Currently, new sublasses require the user to find the correct parent class in the class tree. In larger projects, this can be really painfull.
I suggest two simple things to improve this very common task:
1. Make the class tree searchable: Put a filter string input above where you can filter the tree by name
2. Add a "Create New Sub-Class from this Class" Item to the context menu in project explorer. This could simpy open the class tree with the matching class already selected. Something like this would also be great for interfaces.
