configurable theme

web/src/theme.js

@@ -1,12 +1,22 @@
 export default {
   widgetMenu: {
     iconSize: 80,
-    panelWidth: 300
+    background: "#222"
+  },
+  leftPanel: {
+    width: 300,
+    background: "#ccc"
   },
   tabsPanel: {
-    height: 30
+    height: 30,
+    background:'#ddd',
+    hoverFont: '#338'
   },
   statusBar: {
-    height: 20
+    height: 20,
+    background: "#00c"
+  },
+  mainArea: {
+    background: "#eee"
   }
 };