[DESIGN] Improve Dataset Upload & Management

[fearnworks]

Describe the Issue

Bulk Uploading and Deleting images from a dataset is unintuitive. We need a way to perform these actions quickly on large datasets from both the grid and carousel

Proposed Enhancement

• Add drop zones natively to both gallery views (without toggle).
• Allow selecting a directory for upload
• Enable delete on gallery action bar and enable using delete key to remove
• Implement some sort of recycle area to allow for undo

Impact on Users

Make me not want to drink when I'm editing datasets