Keep modules in separate dirs, move images to their module dirs, and fix
up the module declarations so they still work.
Also moved viewer.svg into the root.
Bug: 56421
Change-Id: Ia84ddfd3b91c784c42d9ba243c5cfd46354f139f
Removed unused circle.svg, added use.svg for "use this file", added
new SVG versions for most icons from Vibha.
Change-Id: Ice2db8fdaf785dae9d3018f78db35c6cbd15f774
Fallback to upload time for now.
Helps to have:
* core
:* I77303d8e535fc1c42e14cfb853814e5c434a81ec
* CommonsMetadata
:* I5e6bc45f9751641e16426231dabcc8277b86fee0
Change-Id: I822b48cebbace51cd8f68adc45a68a1c93ec29db
