2.2.4 version released

In this distribution:
- lookup:
- fixed problem with maxCharacters and columns properties of lookup control
- added "showErrorMessage" property to LookupController, in order to hide the error message when validating an incorrect code
- other input controls:
- improved behavior of FormattedTextControl when losting focus and the field is empty or set to the empty default mask
- grid:
- GridController.selectedCell callback is invoked now also when selecting another column of the same row
- fixed bug introduced with past version of OpenSwing with lookup grid frames
- MDI frame:
- fixed problem with "win icons panel" at the bottom of the MDI environment when adding more windows and removing all of them
- fixed a problem with maximized internal frames when closing them and ClientSettings.STORE_INTERNAL_FRAME_PROFILE is set to true
- fixed problem when double clicking within an empty are of the tree menu
- improved "uniqueInstance" property of internal frames: when trying to open an already not selected unique instance of a frame, now it receive the focus
- improved SwithDialog (thanks to Marandola) by showing the current selected frame in the list of opened frames
- added global properties to ClientSettings (thanks to Marandola), in order to customize the "Window" menu items and "File" menu items and "win icons panels" buttons (icons and visibility)
- added new menu item named "close window" to "Window" menu (thanks to Marandola), in order to close current selected window
- TreeGridPanel:
- added "iconAttributeName" optional attribute, in order to customize the icon to show for each tree node
- added "backgroundColor" optional attribute, in order to set the background color for this component

The distribution includes also Jar file libraries, source files, javadoc, licence and readme.txt installation instructions.