With Quit after Save or Copy checked, there is a desktop
notification when saving which allows to open the folder containing the
saved screenshot. However, when the user opts to let the window stay
open, only the title will reflect the filename of the saved screenshot.
It's quite hard to know in which folder it was saved and not that easy
to open that folder.
By introducing Tools → Open Screenshots Folder, usability in that
regard is much-improved. When no screenshot has been saved yet, it will
open the last Save As folder or the default Save location
depending on the button state. As soon as a screenshot is saved, the
new action will highlight the new screenshot in the filemanager.