TargetSetupPage: Improve handling of checked kits

This patch makes the TargetSetupPage only check one kit by default,
independent of whether or not a preferredKitPredicate is set or not.

The logic is the following:
  * Use the default kit first if it is preferred
  * Use any preferred kit
  * Use the default kit
  * Use any enabled kit

* Do not check kits when the kit filter changes for now, that is
  for a later patch.

* Do not change kit selection as Kits get added/removed/modified if
  that is not necessary

Change-Id: I1e2bf594b902cf3e64d62588cde1dfb8e797bd3f
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

0 files changed, 0 insertions, 0 deletions