Add suggestions when selecting `Follow symbol under cursor` over the pure virtual method or add another feature for this

Very ofter it is required to follow the pure virtual method of the abstract class via the pointer to some base class. Will be great to select one of the implementations of this method in derived classes.
The same will be useful for virtual (not pure virtual) methods as well.
It may be another menu item and keyboard shortcut or some smart behaviour like code completion - user will select appropriate variant if he clicked over the definition of the virtual method.