Make the GUI a little less sluggish. (Port from Huntercoin, thanks Domob).
Merge pull request #70 from phelixnmc/gui_opt

Make the GUI a little less sluggish.
Merge branch 'namecoinq' of https://github.com/namecoin/namecoin into namecoinq
Merge branch 'namecoinq' into utxo
Merge remote-tracking branch 'origin/utxo' into utxo