- Remove 'panel memory effect' when switching kits

  Previously, each target entry memorized when its Build or
  Run page was used, and when switching to the target, that
  page came up.

  Now, don't use that when switching targets, but instead
  take the same page as is selected on the target we are
  switching from.

- Disable selection of the Build&Run and Project Settings
  "group entries"

Change-Id: I2214f8edc38be2e76a50f8984aa75d8f78b62026
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>