Avoid some duplicate property queries

resources/qml/MessageView.qml

@@ -203,7 +203,7 @@ ScrollView {
             TimelineRow {
                 id: timelinerow
 
-                y: section.active && section.visible ? section.y + section.height : 0
+                y: section.visible && section.active ? section.y + section.height : 0
             }
 
             Connections {

resources/qml/ScrollHelper.qml

@@ -90,7 +90,7 @@ MouseArea {
         // Show the scrollbars
         flickable.flick(0, 0);
         flickable.contentY = newPos;
-        cancelFlickStateTimer.start();
+        cancelFlickStateTimer.restart();
     }
 
     Timer {