This patch adds a constant `MODAL_ANCHOR` so that the value
can be used in multiple modals that require it. Also the
ShareImageModal is now properly anchored to it.
Signed-off-by: Pavel Odvody <pavel@redhat.com>
Insights offers 'quickstarts', which can be used to provide
mini-tutorials in a sidebar.
Unfortunately, these quickstarts change our URL... they add an optional
query parameter related to the quickstart. The process of doing so
destroys our router's `location`, setting it to undefined.
We have been using the location state to store the GUID of the image,
needed when opening the wizard via the `Recreate image` action or when
opening the share modal.
As a workaround, we can simply accept that the quickstarts will change
our URL and destroy our router's location. Instead, we now put the image
id (its UUID) in the route itself. We can access it in the components as
necessary via the useParams hook.
