Heavy changes

qml/HorizontalDivider.qml

@@ -0,0 +1,16 @@
+import QtQuick
+import QtQuick.Layouts
+
+Item {
+    height: 8
+    Layout.fillWidth: true
+
+    // https://www.google.com/design/spec/components/dividers.html#dividers-types-of-dividers
+    Rectangle {
+        anchors.centerIn: parent
+        width: parent.width
+        height: 1
+        opacity: Style.dividerOpacity
+        color: Style.dividerColor
+    }
+}