Implement "save palette" button

* Actually a shortcut to "save picture" with preset PAL format and different window title.


git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@2110 416bcca6-2ee7-4201-b75f-2eb2f807beb1

src/palette.c

@@ -2576,6 +2576,13 @@ void Button_Palette(void)
         Wait_end_of_click();
         break;
       }
+
+      case 26: // Load palette (TODO)
+        break;
+
+      case 27: // Save palette
+        Save_picture(CONTEXT_PALETTE);
+        break;
     }