P1 since both descriptions and name is missing

- add a11y names
- add a11y descriptions
- bind components with labels
- add mnemonics

=========================================== Tested Window title : Edit Variable ===========================================

Doesn't implement Accessible : - none.

No Accessible name :

Class
    javax.swing.JTextField { | } 
Class
    javax.swing.JTextField { | } 

No Accessible description :

Class
    javax.swing.JButton { Browse | } 
Class
    javax.swing.JTextField { | } 
Class
    javax.swing.JTextField { | } 
Class
    org.netbeans.core.windows.services.NbDialog { Edit Variable | } 

Label with LABEL_FOR not set : - none.

Components with no LABEL_FOR pointing to it :

Class
    javax.swing.JTextField { | } 
Class
    javax.swing.JTextField { | } 

Components with no mnemonic :

Class
    javax.swing.JButton { Browse | }