Only temporary -- JSComponentUI.dispose is clearing ui.outerNode but
JSComponentUI.undispose is not running, whereas it should.

into yadav1

Conflicts:
	sources/net.sf.j2s.java.core/srcjs/js/j2sSwingJS.js
	sources/net.sf.j2s.java.core/srcjs/swingjs2.js

into yadav1

Conflicts:
	sources/net.sf.j2s.java.core/srcjs/js/j2sSwingJS.js
	sources/net.sf.j2s.java.core/srcjs/swingjs2.js

System.err reports each case of @j2sNative and @j2sIgnore.

Found three bugs immediately.

Frame from main(String[]) not painting initially; 
JPDF missing Serif font;
menuitem not re-parenting properly;

TODO: menu not showing main drop-down by default.

removed unnecessary Enum serialization methods.

FileWriter (OutputStreamWriter) not closing stream. 

final Object obj = "a string" must not be ignored.

javax.imageio:
adds swingjs/image with implemented GIF, JPG, and PNG ImageWriters. 

JOptionPane implemented fully; adds asynchronous pseudo-modal dialog
based on a parent class having onDialogReturn(int) for showMessageDialog
and showConfirmDialog and showOptionDialog; or onDialogReturn(Object)
for showInputDialog

not fully tested, but VARNA now has menu working to export PNG and JPG
files. 

TODO: block modal using a translucent cover.