Update to latest Gio release. Install a system font on Darwin to

get access to Unicode glyphs.

cmd/passgo-gui/impl_android.go

@@ -7,6 +7,7 @@ import (
 
 	"git.wow.st/gmp/passgo"
 	"gioui.org/app"
+	"gioui.org/font/gofont"
 )
 
 var (
@@ -17,6 +18,7 @@ func init() {
 	log(Info, "Android start")
 	// Use a larger font on Android
 	fontSize = 24
+	gofont.Register()
 }
 
 func initPgp(w *app.Window) {