refs #325, name variant pair allows test for existing values

* equal value updates can be skipped
* equalsQVariant in CValueObject
* resizing parameter for views

src/blackmisc/namevariantpairlist.h

@@ -30,11 +30,11 @@ namespace BlackMisc
         //! Construct from a base class object.
         CNameVariantPairList(const CSequence<CNameVariantPair> &other);
 
-        //! Contains name
-        bool containsName(const QString &name);
-
         //! Get name index
-        int getNameRowIndex(const QString &name);
+        int getNameRowIndex(const QString &name) const;
+
+        //! Contains name
+        bool containsName(const QString &name) const;
 
         //! \copydoc CValueObject::toQVariant
         virtual QVariant toQVariant() const override { return QVariant::fromValue(*this); }