Rewrite URL struction handling using BP 12 new logic

[slaFFik]

BP 12 changed the way URLs are built in the network, and right now BPGE requires BP Classic to funciton.
I need to remove BP Classic requirement and rewrite the reliance on a global $bp->components URL parts and use the new API.

with some instructions https://packagist.org/packages/hard-g/buddypress-12.0-url-polyfills >
Basically, load the polyfill library, then update your code to use the new BP 12 functions (and only the new functions).