Open in browser

Most containers expose some http port. We can open it in browser.
For simplicity we can just open first container's published port.
We'll determine the ip:port on container creation and store to meta "Web Port".
To open browser on any platform was added a new dependency github.com/pkg/browser which is very small

grid.go

@@ -162,6 +162,9 @@ func Display() bool {
 		menu = ExecShell
 		ui.StopLoop()
 	})
+	ui.Handle("/sys/kbd/w", func(ui.Event) {
+		menu = OpenInBrowser()
+	})
 	ui.Handle("/sys/kbd/o", func(ui.Event) {
 		menu = SingleView
 		ui.StopLoop()