I'm using Unity with Ubuntu 14.04, and there's no manual refresh button for wifi networks that I can find. So when I click on the wifi icon in the upper right, I just have to wait for it to get around to showing me new networks (this is most frustrating when I've just turned on my 4g hot spot). Sometimes I have to wait 15+ seconds to see my hotspot even though my phone and tablet can already see it (so I know the network is available well before Ubuntu sees it).
Is there any way to get a "refresh" option added to the wifi options in the network drop down list, or to decrease the time between scans for open networks?