reset sync buttons

[remyla]

We would like to be able to tell the system to re-synchronize a file.

• It could happen when a file was published by mistake from the origin. Instead of creating a new version, we would prefer to update it and sync again everywhere
• this could be useful to sync again if a file get corrupted or was mistakenly deleted on a target server

Here is a python call to the API to reset the sync for wf_st_territory-baa_moh.6.ma from circus studio (circus is the origin of the asset):

damas.update({ _id: "/wf/st/territory-baa/moh/wf_st_territory-baa_moh.6.ma",
    synced_online:None,
    synced_onyx:None,
    synced_pipangai:None,
    synced_solidanim:None,
    synced_tnzpv:None})

rsync --ignore-existing option should be avoided in order to re-sync (else, rsync will skip the file)

UI Proposal:

The sync column is shown like this:

	o

we could make these cells interactive:

clicking a green cell would re-sync the corresponding site

clicking the o (origin) would re-sync everywhere (remove all synced_* keys, like the Python example)

[remyla]

This feature is up and running and used in production on WF, we might close the issue and make a doc out of the issue description.