Auto-update GeoBookmark list

[Ben3d1k7]

Hey,
thank you for maintaining this great library!
I'd like to request the ability for the GeoBookmark control to update it's underlying list after clicking on the control's button.
I have a usecase where I have multiple maps on one Html page who should all have the same GeoBookmarks. An added Bookmark in one control is not visible in the other if this other control has already been initialized.
Maybe you could add a parameter where one could specify if the list should be refreshed after clicking on the control's button.
Thank you for considering this request and have a great day!

[Viglino]

The last commit should do the trick!

[Ben3d1k7]

Thanks! I'm looking forward to your next npm release