Fix home view's views being duplicated upon re-selecting home view

Turns out when switching views and deallocating the home view stack view controller we were not emptying out the subviews for the actual stack view, which had a reference held on it by the library window.

This means the created containers would stay alive and included in the home view stack view's subviews... Then when switching back to the home view we'd initialise a new home view stack view controller, which would initialise new containers, and then add them to the home view stack view, creating duplicates

Signed-off-by: Claudio Cambra developer@claudiocambra.com

Thanks @alexandre-janniaux for noticing this bug

Fixes #28815