Bulk Edit of Feature Dates or Auto-Apply release date range Merged

When building features, it's tedious to have to go in one by one and set due dates and start dates to make the features display in the release roadmaps. This is key, because we use the roadmaps at an exec level to keep everyone abreast of the size and complexity of the next 16 months. (Note: I mapped this to Features, but it could be included in Releases)

What would be great would be one (or both) of the following:

1. Allow for bulk editing of the start date and due date
2. have the start date and due date auto-set by a date range in the release (the earliest date and the release date.) This would then make them all display in the roadmap view, then allow for drag and slide fine-tuning