Fix scenario deletion logic and improve recent projects menu handling

[fatehmtd]

Description

Fixed the scenario deletion

Related Issue

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code refactoring
• Performance improvement

Changes Made

Testing

• Built successfully on my platform
• Manually tested the affected functionality
• No new warnings or errors
• Existing features still work as expected

Test Environment

• OS:
• Qt Version:
• Compiler:

Screenshots

Checklist

• My code follows the project's coding standards
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes generate no new warnings or errors
• I have tested my changes thoroughly

Additional Notes