refs #106, moved removeIf from CSequence to CContainerBase and added remove method in CCollection (CSequence already had a remove method)

src/blackmisc/collection.h

@@ -186,6 +186,12 @@ namespace BlackMisc
          */
         const_iterator find(const T &value) const { Q_ASSERT(pimpl()); return pimpl()->find(value); }
 
+        /*!
+         * \brief Efficient remove using the find and erase of the implementation container. Typically O(log n).
+         * \pre The sequence must be initialized.
+         */
+        void remove(const T &object) { auto it = find(object); if (it != end()) { erase(pos); } }
+
         /*!
          * \brief Test for equality.
          * \todo Improve inefficient implementation.