Update balance label when mining

cmd/mist/assets/qml/views/wallet.qml

@@ -15,6 +15,17 @@ Rectangle {
 	objectName: "walletView"
 	anchors.fill: parent
 
+        Label {
+            objectName: "balanceLabel"
+            visible: false
+            font.pixelSize: 10
+            anchors.right: lastBlockLabel.left
+            anchors.rightMargin: 5
+	    onTextChanged: {
+		menuItem.secondaryTitle = text
+	    }
+        }
+
 	function onReady() {
 		setBalance()
 	}

cmd/mist/gui.go

@@ -412,7 +412,9 @@ func (gui *Gui) update() {
 			switch ev := ev.(type) {
 			case core.NewBlockEvent:
 				gui.processBlock(ev.Block, false)
-				gui.setWalletValue(gui.eth.ChainManager().State().GetBalance(gui.address()), nil)
+				//gui.setWalletValue(gui.eth.ChainManager().State().GetBalance(gui.address()), nil)
+				balance := ethutil.CurrencyToString(gui.eth.ChainManager().State().GetBalance(gui.address()))
+				gui.getObjectByName("balanceLabel").Set("text", fmt.Sprintf("%v", balance))
 
 			case core.TxPreEvent:
 				tx := ev.Tx