It fixes whitespace on left when being highlighted when hovering on macOS (OS selection button on top)
The commit also unifies the way top menu buttons are displayed by reusing `MenuOptionListItem`s (renamed from `SelectableOption`) and `MenuOptionList`. This ensures right and consistent behavior.
Finally it fixes `enabled` property in menu option setting disabled state instead.
- Move most GUI related code to /presentation
- Move components to /components (separate from bootstrap and style)
- Move shared components helpers to /components/shared
- Rename Bootstrapping to bootstrapping to enforce same naming
convention in /presentation