edit view should only show views used in current form

[Ferdinand]

currently all views referencing the object are shown.
for objects like crm.case or stock.picking it's hard to select and modify the view for the current form

IMHO either
* only ONE view should be shown and the navigation should be done via inherited View - not so comfortable
or
* all views in the inherit chain should be shown in the list

BTW sometimes it's good to see all views, because for some unknown reason I have very often duplicate view names which IMHO shouldn't happen.