A submodule row linked to a path with its trailing slash stripped,
was labelled by its path rather than its entry name, shared the
name's element with its hash, claimed a size of zero and offered a
blame button that cannot work on a gitlink.
On a phone the tree listing keeps name and size, the diff and stat
option panels hide, the owner line leaves the stacked masthead, and the
search, switcher and authors wait until they fit.