Bug 104134

When defining an event handler, the button in the properties panel displays the
"Handler for <eventname>" dialog. Currently this give you the option of adding,
removing, or renaming a handler. 

Often there will be a handler that can be reused for multiple components. For
example, a focusGained handler for JTextFields that calls selectAll() to select
the contents of the field.

Currently the only way of reusing a handler is to select the value field in the
Properties dialog and type in the name to use. To the best of my knowledge,
there is no way to accomplish this through the "Handler for <eventname>" dialog;
only through the Properties dialog.

I propose either: adding a new "Select" button, or enhancing the "Add" button to
display a list of existing handlers bearing the correct signature. So, when
adding an actipnPerformed handler it would show all methods with the signature
void XXX(java.awt.event.ActionEvent YYY).

This would make it a lot easier than having to type in the name. In complex
forms you can wind up with a lot of these and picking from a list would be much
easier. Especially in light of the fact that when you are making the choice you
are in the Design view and cannot simply browse the code for the correct name