Qml app: fixed unread messages count displaying

Roles in models are not expected to change type, so they must be always
  defined and have the same type

retroshare-qml-app/src/ContactSort.js

@@ -58,6 +58,7 @@ function mergeContactsUnread()
 		var el = jsonData[i]
 		if(unreadMessages.hasOwnProperty(el.gxs_id))
 			el['unread_count'] = unreadMessages[el.gxs_id]
+		else el['unread_count'] = "0" // This must be string
 	}
 }
 

retroshare-qml-app/src/Contacts.qml

@@ -50,8 +50,6 @@ Item
 	function refreshContactsCallback(par)
 	{
 		console.log("contactsView.refreshContactsCB()", visible)
-		if (contactsListModel.model.count < 1)
-			contactsListModel.json = par.response
 		var token = JSON.parse(par.response).statetoken
 		TokensManager.registerToken(token, refreshContacts)
 		contactsSortWorker.sendMessage(

retroshare-qml-app/src/GxsIdentityDelegate.qml

@@ -79,6 +79,7 @@ Item
 			anchors.rightMargin: 10
 			anchors.verticalCenter: parent.verticalCenter
 			height: parent.height - 10
+			spacing: 4
 
 			Rectangle
 			{
@@ -88,15 +89,16 @@ Item
 				antialiasing: true
 				border.color: "blue"
 				border.width: 1
-				height: parent.height
+				height: parent.height - 4
 				radius: height/2
 				width: height
+				anchors.verticalCenter: parent.verticalCenter
 
 				Text
 				{
 					color: "white"
 					font.bold: true
-					text: model.unread_count > 0 ? model.unread_count : ''
+					text: model.unread_count
 					anchors.centerIn: parent
 				}
 			}