Streamline Files interfaces

Summary:

• There's no way you can figure out the ID of a file right now. Expose that

more prominently.

• Put the drag-and-drop uploader on the main page so you don't have to click

through.

• Restore the basic uploader so IE users can theoretically use the suite I

guess? Added author info to basic uploader.

• Show author information in the table.
• Show date information in the table.
• Link file names.
• Rename table for filter views.
• When you upload one file, just jump to it. When you upload multiple files,

jump to your uploads and highlight them.

• Add an "arc download" hint.

Test Plan: Uploaded single files, groups of files, and files via simple
uploader.
Reviewers: codeblock, jungejason, tuomaspelkonen, aran
Commenters: codeblock
CC: aran, codeblock, epriestley
Differential Revision: 746