Change export folder via UI

Not in the UI. It's a config variable export.folder in features.settings.yml. Changing this to a feature request.

It would be much better if we could specify each feature's location on the generation UI, just as we could in D7.

#2741241: Export existing feature where it is currently, not necessarily in modules/custom has been closed as duplicate of this issue.

Just adding for the record: the default value of that field should be the current feature location like it was in D7.

Here is a patch that does a first pass at this. Added a Path field to the Edit form that will override the export directory. However, this needs to be a relative path to the Drupal root. Being able to specify a path outside the root would require more extensive changes regarding the use of $this->root. The only use-case for this would be to write to the temporary directory and maybe that should be an option rather than any arbitrary file path.

But for now, here we go.

Ahh, missed a line that was setting the initial directory. Try this.

Committed to 1edc3b9.