Streamline opening recent projects

[jmmmp]

Working on an existing project is a bit cumbersome: when starting wekinator, one has to go through the windows and “create new project” before being able to load one’s own project. After the project is loaded, the other project that was created has to be closed.

• A “recent projects” tab would make it much faster to open projects (the open folder is always reset)
• also a way to start wekinator with a configubrable script would make it more adequate for performance situations - in that script would be at least the project file, possibly other options