Add a preference and preference page for displaying overhangs

Printer.qml

@@ -196,7 +196,13 @@ UM.MainWindow {
         }
     }
 
-    UM.PreferencesDialog { id: preferences }
+    UM.PreferencesDialog {
+        id: preferences
+
+        Component.onCompleted: {
+            addPage(qsTr('View'), Qt.resolvedUrl('./ViewPage.qml'));
+        }
+    }
 
     PrinterActions {
         id: actions;

ViewPage.qml

@@ -0,0 +1,23 @@
+import QtQuick 2.1
+import QtQuick.Controls 1.1
+import QtQuick.Layouts 1.1
+
+import UM 1.0 as UM
+
+UM.PreferencesPage {
+    //: General configuration page title
+    title: qsTr("View");
+
+    GridLayout {
+        columns: 2;
+
+        CheckBox {
+            checked: UM.Preferences.getValue('view/show_overhang');
+            onCheckedChanged: UM.Preferences.setValue('view/show_overhang', checked)
+
+            text: qsTr("Display overhang");
+        }
+
+        Item { Layout.fillHeight: true; Layout.columnSpan: 2 }
+    }
+}