The project part ids are now already created very early in the database.
This removes some checks because we can assume that an id already exists.
The project part are now completely persistent, so we can read them from
the database and compare them with new generated from a new creator
session. This should help to not recreate the same PCH again and again.
Task-number: QTCREATORBUG-21151
Change-Id: Iced818ff9f7431eaed3e37978087cc0a43b9afda
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
The project parts are now first used by the pch manager and then notified
by the pch manager to the refactoring plugin.
Change-Id: I88074d8891cd0de9721497bbafee0deffc0b6339
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>