Request: Allow scaling or customization of toolbar icon size in Eclipse IDE

Hi everyone, and thanks for your work on Eclipse.

I would like to propose a small but important usability improvement regarding the UI scaling options in the Eclipse IDE, specifically on macOS.

Even though editor fonts and the Package Explorer can be scaled normally, the toolbar icons remain fixed in size on macOS. I have not found any option — in Preferences → Appearance or in configuration files — that allows adjusting or scaling their size.
For clarity, I am using Eclipse with the default built-in theme, with no third-party themes or custom CSS.

On high-resolution monitors (such as 2K or 4K), the toolbar icons appear noticeably small on macOS, which affects accessibility and day-to-day usability. Modern UI toolkits typically support scalable icons or adjustable icon sizes, so adding such capability would be very helpful.

It would be great to have:
• A preference to increase/decrease toolbar icon size on macOS, and/or
• Support for scalable vector icons (SVG), or
• An alternative theme with larger icon assets.

If such an option already exists on macOS and I missed it, I would appreciate any guidance. Otherwise, I believe this enhancement could significantly improve usability for macOS users on high-DPI displays.

Thanks for your time and for continuing to improve the Eclipse IDE.

Best regards,
Marcos

El issue no indica archivos fuente, tests ni puntos de entrada. Empieza por localizar la implementación de la barra de herramientas de macOS, los ajustes de Preferences → Appearance y las rutas de los assets de temas o iconos; después determina cuál de los enfoques propuestos es viable. La tarea debería considerarse terminada cuando exista un tamaño de icono de la barra de herramientas configurable por el usuario que funcione en pantallas macOS de alta densidad de píxeles.

Escrito por el modelo de indexación a partir del texto del issue.