ui-tree: render any matching README file in tree view

While listing the items in tree view, if we spot a filename
matching any inline-readme entries from the config file,
we stash the first one into walk_tree_context.

After the tree view has been shown, if there is a stashed
inline-readme we render it inline.

Signed-off-by: Andy Green <andy@warmcat.com>
Reviewed-by: John Keeping <john@keeping.me.uk>
1 file changed