Revert "clarify saving custom source in order to be usable"
Revert "clarify saving custom source in order to be usable"

This reverts commit 08ab924c9023a62af4d2744974cb66d3d3ad59d0.

Zhao-Qi/mapbox-studio-classic,crowdcover/mapbox-studio,wakermahmud/mapbox-studio,mapbox/mapbox-studio-classic,mapbox/mapbox-studio-classic,wakermahmud/mapbox-studio,tizzybec/mapbox-studio,ali/mapbox-studio,mapbox/mapbox-studio,danieljoppi/mapbox-studio,Zhao-Qi/mapbox-studio-classic,crowdcover/mapbox-studio,adozenlines/mapbox-studio,crowdcover/mapbox-studio,AbelSu131/mapbox-studio,xrwang/mapbox-studio,tizzybec/mapbox-studio,wakermahmud/mapbox-studio,adozenlines/mapbox-studio,danieljoppi/mapbox-studio,danieljoppi/mapbox-studio,mapbox/mapbox-studio-classic,xrwang/mapbox-studio,ali/mapbox-studio,ali/mapbox-studio,mapbox/mapbox-studio,danieljoppi/mapbox-studio,Zhao-Qi/mapbox-studio-classic,adozenlines/mapbox-studio,AbelSu131/mapbox-studio,mapbox/mapbox-studio,Zhao-Qi/mapbox-studio-classic,wakermahmud/mapbox-studio,ali/mapbox-studio,xrwang/mapbox-studio,xrwang/mapbox-studio,Zhao-Qi/mapbox-studio-classic,tizzybec/mapbox-studio,mapbox/mapbox-studio,tizzybec/mapbox-studio,tizzybec/mapbox-studio,danieljoppi/mapbox-studio,wakermahmud/mapbox-studio,xrwang/mapbox-studio,AbelSu131/mapbox-studio,ali/mapbox-studio,crowdcover/mapbox-studio,crowdcover/mapbox-studio,adozenlines/mapbox-studio,AbelSu131/mapbox-studio,mapbox/mapbox-studio-classic,adozenlines/mapbox-studio,mapbox/mapbox-studio,AbelSu131/mapbox-studio