Refactored code to address code smells and improve readability

[ochotzas]

This commit focuses on refactoring the code to address identified code smells and enhance the overall readability of the codebase. The following specific changes have been made:

• In the ExecutationSetupView class:
  Fixed indentation and removed unnecessary empty lines.
  Renamed the class to correct a the typo.

• In the NewBufferView class:
  Reorganized imports for better organization.
  Improved variable naming to enhance code clarity.

• In the PowerLineView class:
  Added null safety checks to ensure robustness.
  Extracted a separate method for setting the file name, improving code modularity.

Additionally, a few changes were applied to Main.kt and MainView.kt to align with the overall refactoring effort.

These modifications significantly contribute to the maintainability and comprehensibility of the codebase, facilitating future development and maintenance tasks.

[BenHerbst]

Thank you for your work