dynamic currencies

[hansbak]

add variable currencies in showing prices

[acetousk]

@hansbak This looks good.

My only worry is that product.priceUomId will be null. To maintain backwards comparability, might as well set it to $ if it is null

[hansbak]

Please feel free, to change, i made many more changes, like many fixes and multicompany and included a version in my monorep at https://github.com/growerp/growerp/tree/master/moqui/runtime/component/PopRestStore could be useful to compare with the moqui-PopRestStor
regards.