Commits on Jul 28, 2023

1. Fixed crash when changing file member of custom class …

   This crash was caused by an infinite recursion happening when changing
   top-level FilePath values. It only affected Qt 6 builds, because two
   QVariant values that both hold a FilePath value always compared as
   unequal due to FilePath not defining a comparision operator.
   
   In addition to adding the comparison operator, I've also added a
   condition to the updating of the property value. It should only be
   necessary to update the top-level value when a nested value was changed.
   Further more, it now sets mUpdatingDetails as another protection against
   recursive calls.
   
   For completeness I've also added the comparision operator to
   PropertyValue and ObjectRef, though they would not have caused problems
   in this context since they're not used as property display values.
   
   Closes mapeditor#3783

   

   bjorn committed Jul 28, 2023
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