ask to stop current debug session when user saves the project in debug mode

[hamaney]

When in active debug mode, and the user saves the project, communicate the error to the user in one of two ways:

• show an error dialog
• prompt the user if they want to "stop current debug session and save project"

current in r2 console

ERROR: radare2 does not support projects on debugged bins
ERROR: Cannot save project

[trufae]

this is an easy one. ill take care of this even if i never considered debugging on iaito a stable thing