async device open and create from device, passphrase

- passphrase entry on host added, requires early listener setting monero pull #5355
- wallet open and create from device shows splash to indicate possible long process
- create from device is async to support passphrase entry

components/Style.qml

@@ -17,6 +17,7 @@ QtObject {
     property string defaultFontColor: "white"
     property string dimmedFontColor: "#BBBBBB"
     property string lightGreyFontColor: "#DFDFDF"
+    property string warningColor: "#963E00"
     property string errorColor: "#FA6800"
     property string inputBoxBackground: "black"
     property string inputBoxBackgroundError: "#FFDDDD"