Fix asset switching on timeline

Not sure why I undid this before
Update icons after upload

Fixes #2505
Fix Store.excerpt handing

Fixes #2506
Remove asset display when editing timeline
Don't allow sorting on menu/id columns

Fixes #2503
Always show untimed timeline objects as full-range
Rename module to app

Saves 333 bytes?  Mainly to be purescript-friendly.
Remove old browser
Split spreadsheet out into separate materials/sessions
consent icon positioning in slot track
Remove (bindonce) watch on model object

Was hugely slowing the first digest cycle for the copy
spreadsheet styling
Merge branch 'master' of github:databrary/databrary
Partially revert 5566b7f7533eb0302da1b54b3d487d459424541c

Fixes #2512
Start timeline in edit mode when coming from spreadsheet edit

Fixes #2514
make column with delete button not appear sortable on ss editing
Pre-fill filename during upload; tweak order; placeholders

Fixes #2515
Make timeline edit back link go to spreadsheet

This is slightly questionable -- maybe there should be a link to both
places?  Fixes #2518
volume download link and spreadsheet styling
Merge branch 'master' of github:databrary/databrary