feature request: move document easily

[breezewish]

[gregwebs]

The traditional approach would be to Drag and Drop onto the tree. However, drag & drop is tricky. I like the approach that Google Docs currently takes of selecting the folder separately. I think though we could make it visually nicer by instead of displaying one folder at a time displaying the active tree being navigated.

[gregwebs]

The current workflow is to open the folder in gdrive (click on breadcrumb if viewing a file) and then move it there. Alternatively, open the file itself and use the move functionality there. Note that edit mode for the doc (embed) appears to not support the file move operation.