Fix some Bitcoin mentions in Qt#844

Merged

stevenroose merged 2 commits intoElementsProject:masterfrom

stevenroose:bitcoin-mentions

Apr 6, 2020

Commits on Apr 2, 2020

Replace some Bitcoin mentions with Elements
stevenroose
committed

Commits on Apr 6, 2020

Add parameter for chain name in initial download string

philippem
authored and
stevenroose
committed