disable connect button, when user address input is empty (fixes #124)
disable connect button, when user address input is empty (fixes #124)

theWebalyst/remotestorage.js,mcanthony/remotestorage.js,lewisl9029/remotestorage.js,remotestorage/remotestorage.js,untitaker/remotestorage.js,untitaker/remotestorage.js,remotestorage/remotestorage.js,remotestorage/remotestorage.js,mcanthony/remotestorage.js,theWebalyst/remotestorage.js,lewisl9029/remotestorage.js