Add hotkeys to Kicad manager, and some rework on hotkeys management.

include/base_struct.h

@@ -488,6 +488,7 @@ public:
      */
     static bool Sort( const EDA_ITEM* aLeft, const EDA_ITEM* aRight ) { return *aLeft < *aRight; }
 
+#if 0
     /**
      * Operator assignment
      * is used to assign the members of \a aItem to another object.
@@ -496,6 +497,8 @@ public:
      *          as there is a known issue with wxString buffers.
      */
     virtual EDA_ITEM& operator=( const EDA_ITEM& aItem );
+    #define USE_EDA_ITEM_OP_EQ
+#endif
 
     /// @copydoc VIEW_ITEM::ViewBBox()
     virtual const BOX2I ViewBBox() const;