This patch make it possible for a plugin to detect when the user do "new project"

The new push have a restored makefile.win32 and name changed for the signal

The aim for the change is to detect when a user do a "new Project"

This is needed later for the plugin i will create, when the user do "new Project" the plugin will auto create a number of files in the directory created by new Project and change file settings and endings.



…and this defines a signal with no extra argument (e.g. from a caller POV, only `void func(GObject *obj, gpointer data)`).