Allow user override file if it's already exists

[volodymyrkochyn]

Motivate of the pull request

• [ ] To address an existing issue. If so, please provide a link to the issue:
• [x] Breaking new feature. If so, please describe details in the description part.

Describe the technical details

Provide "overwrite" option when creating file with the same name in Raptor GUI

Which part of the code base require a change

• [x] Library: newproject
• [ ] Plug-in: <Specify the plugin name>
• [ ] Engine
• [ ] Documentation
• [x] Regression tests
• [ ] Continous Integration (CI) scripts