Ml datagen

[Devendork]

merging features intended to support the bulk creation and download of drafts for uses of training machine learning algorithms.

Features include:

1. "variants" function that generates multiple variants of the same draft that are still structurally equivalent
2. download all visible drafts box on tool bar to bulk download drafts.
3. support for viewing or hiding drafts generated from operations
4. a crop features (for cropping a section within a draft"
5. changed "mirror" to "replicate" to solve confusions that emerged in Mica workshop
6. added support for generating drafts from threading tieup and treadling and/or drawdown.
7. removed ability to edit drafts that are generated from operations
8. added support for naming individual drafts.