opibuilder cursor for disabled widgets #790
Description
Widgets appear 'disabled' when the PV has no write access.
Out of the box, that tends to work great. But when people apply what they consider superior color schemes, the difference between an enabled and disabled widget can become subtle. Users think they can for example push a button, when in reality it's disabled, and next the user wonders why nothing happens in response to clicking a button.
What would help is an additional change in the cursor for disabled widgets.
Should probably use the SWT.CURSOR_NO system cursor to allow use in the webopi.