Remember the last used folder when adding new link

[mecuricat]

Is your feature request related to a problem? Please describe. I am saving several links to a folder continuously but I have to change the folder name from None every time I add a new link.

Describe the solution you'd like It would be helpful if the app remembers the last used folder. Please add a toggle in settings if user wants to set the last used folder as default instead of None.