Merge pull request #1283 from FlowFuse/notifications-send-to-all

Docs: Detail method to send a notification to all users

docs/nodes/widgets/ui-notification.md

@@ -82,3 +82,9 @@ This notification was created using a `msg.payload` of:
 ```html
 <h3>Generated Notification</h3><p>This is custom HTML injected into <b>Node-RED</b></p>
 ```
+
+### Sending to all clients
+
+Notifications are, by default, constrained to send to a single user/client. In Dashboard 2.0 this constraint is defined by `msg._client`. You can read more about this [here](../../user/multi-tenancy.md#configuring-client-data).
+
+If you want to send a notification to _all_ connected clients, you can remove the `msg._client` value using a "change" node, configured to "Delete" the `_client` property.

docs/user/multi-tenancy.md

@@ -80,7 +80,7 @@ In the [Dashboard sidebar](./sidebar.md#client-data) within the Node-RED Editor,
 <img data-zoomable style="max-width: 400px; margin: auto;" src="/images/dashboard-sidebar-clientdata.png" alt="Screenshot of an example 'Client Data' tab"/>
 <em>Screenshot of an example "Client Data" tab</em>
 
-Client data defines information on the user/client interacting with the Dashboard. This data can be appended to every `msg` a node emits, underneath teh `msg._client` object.
+Client data defines information on the user/client interacting with the Dashboard. This data can be appended to every `msg` a node emits, underneath the `msg._client` object.
 
 When "Include Client Data" is enabled, every `msg._client` will detail the `socketId` and `socketIp` of any connected users.