Fixed sorting of pimpy tasks on the frontend

The frontend did not implement sorting for pimpy tasks. It just used the "undefined" behavior of v-for when looping over the "tasks" objects. I added the baas32 decoding as used on the backend, and tasks will now be displayed in the correct order. (You can test with 10YM and 113H).

Idk where to put the functions, so I just put them inside the vue file. If it should be placed somewhere else, let me know.