Not yet compatible with Plone 5!
Back in the old days we used to customize views' templates from the tool
portal_view_customizations from the ZMI.
This tool has no UI (User Interface) and could beat you whenever you don't expect it.
Nathan Van Gheem has created this package that unfortunately is not (yet!) part of the core: collective.jbot.
This package uses the well-known
z3c.jbot under the hood and allows you to customize templates TTW (Through-The-Web) from the control panel.
Overrides are stored on the filesystem and you can version / backup them as you like!