[class] Spinner

I wrote this class to try to simplify porting a B4A app to B4i. The app uses Spinners, and I was frustrated by the lack of a suitable replacement. I tried Pickers, but they take up too much space. Also, a lot of fiddly changes/conditional compilation is required to handle differences between B4A and B4i, in particular differences in trivial things like the way you set the text size.

So, I wrote this class to mimic the B4A Spinner programming interface and hide a lot of the differences...

[class] Spinner

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