Improvements to asset/log edit forms

Improvements to asset/log edit form

*Work was started on this in PI1 #162 (closed). Creating a separate issue to track this individual feature, work continued in PI3.

The current default forms for editing assets and logs are long and make it difficult to quickly submit and edit specific fields of interest. This editing experience can be improved in a few major ways:

1. Implement the Gin admin theme's "Content Form Sidebar":
   1. This adds a sidebar on the right-hand side of the form that is an ideal place to put the "metadata" fields that are frequently updated, yet take up less vertical space in the form (status, revision information, flags, categories, etc).
   2. The Gin "Content Form Sidebar" also moves the "Save" button to the top right corner of the form. This is a huge improvement for quick creation/edits because you do not need to scroll to the bottom of the page to click "Save".
2. Allow adding vertical tab groups in asset/log edit forms:
   1. Grouping fields into relevant categories (Default, Location, Files, etc) makes it possible to quickly navigate to specific fields of interest without scrolling through the entire form and keeps fields that are logically related to each other in the same isolated space.
   2. Also decreases the overall height of forms.
   3. Provide a mechanism for additional "bundle" or "contrib" fields to be added to their desired tab groups.
   4. Likely provide a mechanism to turn of tab groups if desired (perhaps simply override the default display)