Feature : color palette

- Fixed : manager UI is redrawn after save
- the Selected palette is saved as a user preference
- default background is now the dark one
- the selected palette is not reset after closing palette manager

src/js/utils/UserSettings.js

@@ -4,10 +4,12 @@
   ns.UserSettings = {
     GRID_WIDTH : 'GRID_WIDTH',
     CANVAS_BACKGROUND : 'CANVAS_BACKGROUND',
+    SELECTED_PALETTE : 'SELECTED_PALETTE',
 
     KEY_TO_DEFAULT_VALUE_MAP_ : {
       'GRID_WIDTH' : 0,
-      'CANVAS_BACKGROUND' : 'medium-canvas-background'
+      'CANVAS_BACKGROUND' : 'lowcont-dark-canvas-background',
+      'SELECTED_PALETTE' : Constants.NO_PALETTE_ID
     },
 
     /**

src/js/utils/core.js

@@ -37,7 +37,7 @@ if (typeof Function.prototype.bind !== "function") {
     if (r > 255 || g > 255 || b > 255) {
       throw "Invalid color component";
     }
-    
+
     return ((r << 16) | (g << 8) | b).toString(16);
   };