tst_QHeaderView: cleanup

Cleanup QHeaderView autotest:
 - use range-based for loops
 - use nullptr
 - use member initialization
 - use new signal/slot syntax
 - use static invocations
 - use override

Change-Id: I4df0b46c58ae9ae9dd4d9762390a2b14886aa68f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
This commit is contained in:
Christian Ehrlicher 2019-09-08 20:18:51 +02:00
parent 36a5b00a92
commit c5c51f442a

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