Investigate: Can we avoid having to select a folder when scaffolding

I'm not sure but I think it's possible to access the first selected element of the tree which in our case would be the directory to scaffold to. When the directory is not empty the user shall be asked if they really want to use it with the option to select a different directory (current behavior). If the selected file is not a directory just immediately open the select folder dialog.

Start by locating the scaffolding flow and the code handling the selected tree element. Verify how directory and file selections are currently passed to the folder dialog. Done means a selected directory can be used directly when appropriate, while non-empty directories prompt for confirmation and selected files open the folder dialog.

Written by the indexing model from the issue text.