[Request] Enable Multi Select on Build Selection Screen

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• I've checked for duplicate open and closed issues by using the search function of the issue tracker

What platform are you running Path of Building on?

Windows

Is your feature request related to a problem?

It's frustrating to have to deal with each one of these manually

Describe the solution you'd like

It would be nice if POB had standard multiselect functionality.

Standard OS-level functionality would be nice: click and hold Shift to select consecutive items, and hold down Control to select individual items.

Describe alternatives you've considered

n/a

Additional context

If you wanted to get fancier, you could experiment with a Gmail-style checkbox UI and have a star/favorite functionality, but I think that is more than what people would want, and I assume it would take longer to implement.

El issue no especifica archivos ni pruebas; empieza por localizar la pantalla de selección de builds y el punto de entrada del manejo de entradas en la aplicación Lua. Verifica cómo se representa el estado de selección y, después, confirma que en Windows se pueden seleccionar elementos consecutivos con Shift y elementos individuales con Control.