[104] Merge sync. (#27)

Author: willlarche

mdc_100_series/lib/app.dart

@@ -35,8 +35,8 @@ class _ShrineAppState extends State<ShrineApp> {
       title: 'Shrine',
       home: Backdrop(
         currentCategory: _currentCategory,
-        frontPanel: HomePage(category: _currentCategory),
-        backPanel: CategoryMenuPage(
+        frontLayer: HomePage(category: _currentCategory),
+        backLayer: CategoryMenuPage(
           currentCategory: _currentCategory,
           onCategoryTap: _onCategoryTap,
         ),

mdc_100_series/lib/backdrop.dart

@@ -222,15 +222,15 @@ class _BackdropState extends State<Backdrop>
               width: 72.0,
               child: IconButton(
                 padding: EdgeInsets.only(left: 20.0),
-                onPressed: _toggleBackdropPanelVisibility,
+                onPressed: _toggleBackdropLayerVisibility,
                 icon: brandedIcon,
               ),
             ),
             widget.frontTitle,
           ],
         ),
         backTitle: IconButton(
-          onPressed: _toggleBackdropPanelVisibility,
+          onPressed: _toggleBackdropLayerVisibility,
           icon: Icon(Icons.close),
         ),
       ),