simplewallet: revert to foreground refresh at startup
simplewallet: revert to foreground refresh at startup

Background refresh is confusing to users at startup.

ranok/bitmonero,eiabea/bitmonero,ranok/bitmonero,ranok/bitmonero,eiabea/bitmonero,eiabea/bitmonero,ranok/bitmonero,eiabea/bitmonero,ranok/bitmonero,ranok/bitmonero,eiabea/bitmonero,eiabea/bitmonero