Theme list updates when the preferences dialog is opened

Themes now set their enabled boolean when being disabled
Fixes issue 1140, fixes issue 1139

git-svn-id: http://svn.dmdirc.com/trunk@3898 00569f92-eb28-0410-84fd-f71c24880f

src/com/dmdirc/ui/themes/Theme.java

             return;
         }
         
+        enabled = false;
+        
         IdentityManager.removeIdentity(identity);
     }
 

src/com/dmdirc/ui/themes/ThemeManager.java

      * @return A list of available themes
      */    
     public static Map<String, Theme> getAvailableThemes() {
+        loadThemes();
+        
         synchronized (THEMES) {
             return new HashMap<String, Theme>(THEMES);
         }
      */
     public static String getThemeDirectory() {
         return THEME_DIR;
-}
-    
+    }
+
 }