#343 When new class is created, files should be saved automaticly

[Reijo Tomperi]

When new class is created the .h and .cpp files should
be saved automaticly. Now user has to do that manually
which is just unnecessary extra work for the user. User
will see and is able to modify the filenames in the
"new class" dialog, so user should know for sure that
he/she wants to save the files if the presses OK.

This is a major lack in usability, because of the the
work required from the user when the software could do
the same and should be fixed very soon.

Actions required by the user are:
- ctrl + s
- OK (mouse click)
- Change tab (mouse click)
- ctrl + s
- OK (mouse click)
- Possibly change tab back (mouse click)