Before this commit, the portal user can see the parent stat button in
project sharing form view of task if the parent is in the same project.
This button can be clicked and it redirects the user to the parent task
form view in the project sharing.
This commit improves this button and its visibility in project sharing
feature. The button is visible only if the current user has access to
the project of the parent task. That is the privacy visibility of the
project should be set to 'portal'. If the portal user has access to the
project of the parent task and he is not a collaborator of this project,
then the current user will be redirected to the classic portal view of
the parent task. If it is a collaborator then we display the parent task
in the project sharing feature.
task-2648955
Closes#82379
Xavier BOL (xbo)
70e5f6ccbb