[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.

该 issue 没有指出文件或测试；首先定位 Lua 应用中的构建选择界面及其输入处理入口。确认选择状态的表示方式，然后确认在 Windows 上可以使用 Shift 选择连续项目，并使用 Control 选择单个项目。