Ref T545 Using constructor inheritance in derived container classes.

src/blackmisc/input/actionhotkeylist.h

@@ -33,6 +33,7 @@ namespace BlackMisc
         {
         public:
             BLACKMISC_DECLARE_USING_MIXIN_METATYPE(CActionHotkeyList)
+            using CSequence::CSequence;
 
             //! Default constructor
             CActionHotkeyList() = default;

src/blackmisc/input/joystickbuttonlist.h

@@ -32,6 +32,7 @@ namespace BlackMisc
         {
         public:
             BLACKMISC_DECLARE_USING_MIXIN_METATYPE(CJoystickButtonList)
+            using CSequence::CSequence;
 
             //! Default constructor
             CJoystickButtonList() = default;

src/blackmisc/input/keyboardkeylist.h

@@ -33,6 +33,7 @@ namespace BlackMisc
         {
         public:
             BLACKMISC_DECLARE_USING_MIXIN_METATYPE(CKeyboardKeyList)
+            using CSequence::CSequence;
 
             //! Default constructor
             CKeyboardKeyList();