dashboard: an entry's menu in the document box

The document box edited an entry by a double-click and added to a map
or list by the `+` on its row; a key couldn't be renamed, and a list's
`+` always asked for an index.

A right-click on an entry, or a finger held on it half a second, opens
its menu: `Edit value` (as the double-click), `Rename key` for a map's
key, and on a map `Add a key`, on a list `Append an item` or `Insert
an item at…`. Renaming reads the value, writes it under the new key
and deletes the old one (two writes, the value as JSON; a key that
exists already isn't overwritten). Inside a field being edited, and
where an entry offers nothing, the browser's own menu shows.

1 files changed, 5 insertions, 0 deletions

diff --git a/docs/dashboard.md b/docs/dashboard.md
index 28f31a1..e0e2acc 100644
--- a/docs/dashboard.md
+++ b/docs/dashboard.md
@@ -338,6 +338,11 @@ to the whole swarm like any other:
   level).
 * **`+` on a list's row** inserts an item at an index (`-1`: at the end); the items
   from there on move up.
+* **Right-click an entry** (or hold a finger on it) for its menu: `Edit value` (as the
+  double-click), `Rename key` (a map's key), and on a map `Add a key`, on a list
+  `Append an item` or `Insert an item at…` (as the `+`, the index asked for). Renaming
+  reads the value, writes it under the new key and deletes the old one: two writes, the
+  value as JSON, as the store reads it; a key that exists already isn't overwritten.
 
 Each user sees and edits what its capabilities let it ([`access.md`](access.md)): of a part it
 may only partly read, the keys on the way to what it may. Protocol data (`_continuum`)