Fix ListView no longer displays images (servicing)

[RussKie]

(cherry picked from commit d0608e7)

Fixes #4169

Proposed changes

Changes in ImageList ownership model in #3601 means that very are now two instances of imagelists - one instance is tracked by Windows Forms (i.e. managed) side, and another one tracked by the underlying Win32 (unmanaged) side. This was done due to an observed ownership disconnect between the managed and unmanaged code, that led to situations where the unmanaged code would effectively destroy and instance of an imagelist, which the managed code was oblivious to.

However with the above change changes to images in an imagelist on the managed side, i.e. a user adding or replacing an image in the imagelist, would not be reflected in the imagelist on the unmanaged side, and thus would not be reflected in the UI (which is drawn by the Win32).

The fix reuses the established infrastructure that notifies the managed imagelist implementation of changes to the images collection, and once a notification of a chance is received, the unmanaged imagelist is re-created, thus ensuring the UI has all the correct images to display.

Customer Impact

• A control that references an ImageList that gets its images dynamically modified will render the images correctly.

Regression?

• Yes

Risk

• Minor

Microsoft Reviewers: Open in CodeFlow