[platform-ui-dev] Part visible and activation events

["Paul Webster" <pwebster@xxxxxxxxxxxxxxxxxxx>]

To fix https://bugs.eclipse.org/bugs/show_bug.cgi?id=168524
[WorkbenchParts] On restart partActivated (and partVisible) called
before widgets are visible

we've delayed partVisible, partActivated, and partBroughtToTop events
until the part is actually visible.  The events maintain their
relative order for each part, but the overall event order changes
(i.e. all the partOpened events fire before any part is visible).

This will be a change worth noting in the migration guide.

-- 
Paul Webster
Hi floor. Make me a sammich! - GIR