Add dialog title

interface/resources/qml/hifi/tablet/TabletAttachmentsDialog.qml

@@ -19,6 +19,8 @@ Item {
     id: root
     objectName: "AttachmentsDialog"
 
+    property string title: "Avatar Attachments"
+
     property bool keyboardEnabled: false
     property bool keyboardRaised: false
     property bool punctuationMode: false
@@ -36,11 +38,46 @@ Item {
         Tablet.getTablet("com.highfidelity.interface.tablet.system").gotoHomeScreen();
     }
 
+    anchors.topMargin: 90  // Space for header.
+
+    // FIXME: Refactor with other tablet headers.
+    Rectangle {
+        id: header
+        height: 90
+        anchors {
+            left: parent.left
+            right: parent.right
+            bottom: parent.top
+        }
+        z: 100
+
+        gradient: Gradient {
+            GradientStop {
+                position: 0
+                color: "#2b2b2b"
+            }
+
+            GradientStop {
+                position: 1
+                color: "#1e1e1e"
+            }
+        }
+
+        RalewayBold {
+            text: title
+            size: 26
+            color: "#34a2c7"
+            anchors.verticalCenter: parent.verticalCenter
+            anchors.left: parent.left
+            anchors.leftMargin: hifi.dimensions.contentMargin.x
+        }
+    }
+
     AttachmentsContent {
         id: attachments
 
         anchors {
-            top: parent.top
+            top: header.bottom
             left: parent.left
             right: parent.right
             bottom: keyboard.top