Fixes qrscanner to 1.9 API.
Adds a settings dialog for qrscanner plugin - allows device selection
Fixes sending coins from the qrscanner plugin
Merge pull request #353 from EnigmaCurry/qrscanner_fixes

QR code scanner fixes
latest wikia version, tested

latest wikia version with 1.9 strings
fix redeemPubKey for imported keys (fixes issue #350)
Merge pull request #354 from rdymac/patch-1

latest wikia version, tested
fix: wait_for_network