Cannot override `TaskbarIcon.Dispose(bool)` because it is not overridable

[jhinder]

The documentation of TaskbarIcon.Dispose() says this:

This method is not virtual by design. Derived classes should override <see cref="Dispose(bool)"/>.

However it is impossible to actually override Dispose(bool) because it is a) private and b) not virtual.

Version: 1.1.0