Arvados

Following the project page design:

• Remove the [DETAILS] and [FILES] buttons since they don't do anything.
• Upper panel is default collapsed showing the collection icon, the name, and the toolbar. User can click on a chevron to expand to show full description and properties. (this should behave the same as the project page)
• The file listing takes up the rest of the page, resizing based on the view so that it doesn't require scrolling like it does now (i.e. the same sizing that the project view uses).
• The details panel should be reorganized to roughly match the ordering of the project page, e.g.

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• Also make sure the description font/style matches the project and process description

As part of this ticket, or a companion to this ticket, it should render the descriptions as sanitized HTML, and the collection "edit" panel should support rich text (so consider doing #21884 at the same time)