Changed the name of the 'Add Game' icon png file, as the previous nam…

…e didn't work with GWT/HTML5 for some reason.

core/src/main/java/com/agifans/agile/HomeScreen.java

@@ -416,7 +416,7 @@ public Button buildAppButton(AppConfigItem appConfigItem) {
 
         Label label = null;
         if ((appConfigItem.getDisplayName() == null) || appConfigItem.getDisplayName().trim().isEmpty()) {
-            if ("_ADD_GAME_".equals(appConfigItem.getGameId())) {
+            if ("ADD_GAME".equals(appConfigItem.getGameId())) {
                 label = new Label("Add Game", skin);
             } else {
                 label = new Label("[empty]", skin);