Ref T259, Ref T243 prefill provider situations, so interpolator can immediately start

src/blackmisc/timestampobjectlist.h

@@ -147,6 +147,9 @@ namespace BlackMisc
         //! \remark adjust offset to average offset of two adjacent elements so adjusted values are sorted
         void push_frontKeepLatestFirstAdjustOffset(const OBJ &value, int maxElements = -1);
 
+        //! Prefill with elements
+        void prefillLatestAdjustedFirst(const OBJ &value, int elements, qint64 deltaTimeMs = -1);
+
         //! Is completely sorted: latest last
         //! \remark all object must have a valid timestamp
         bool isSortedAdjustedLatestLast() const;