docs: adds uid to dashboard.json reference docs

docs/sources/reference/dashboard.md

@@ -10,7 +10,7 @@ weight = 100
 
 # Dashboard JSON
 
-A dashboard in Grafana is represented by a JSON object, which stores metadata of its dashboard. Dashboard metadata includes dashboard properties, metadata from rows, panels, template variables, panel queries, etc.
+A dashboard in Grafana is represented by a JSON object, which stores metadata of its dashboard. Dashboard metadata includes dashboard properties, metadata from panels, template variables, panel queries, etc.
 
 To view the JSON of a dashboard, follow the steps mentioned below:
 
@@ -27,6 +27,7 @@ When a user creates a new dashboard, a new dashboard JSON object is initialized
 ```json
 {
   "id": null,
+  "uid": "cLV5GDCkz",
   "title": "New dashboard",
   "tags": [],
   "style": "dark",
@@ -34,7 +35,7 @@ When a user creates a new dashboard, a new dashboard JSON object is initialized
   "editable": true,
   "hideControls": false,
   "graphTooltip": 1,
-  "rows": [],
+  "panels": [],
   "time": {
     "from": "now-6h",
     "to": "now"
@@ -58,7 +59,8 @@ Each field in the dashboard JSON is explained below with its usage:
 
 | Name | Usage |
 | ---- | ----- |
-| **id** | unique dashboard id, an integer |
+| **id** | unique numeric identifier for the dashboard. (generated by the db) |
+| **uid** | unique dashboard identifier that can be generated by anyone. string (8-40) | 
 | **title** | current title of dashboard |
 | **tags** | tags associated with dashboard, an array of strings |
 | **style** | theme of dashboard, i.e. `dark` or `light` |
@@ -66,7 +68,6 @@ Each field in the dashboard JSON is explained below with its usage:
 | **editable** | whether a dashboard is editable or not |
 | **hideControls** | whether row controls on the left in green are hidden or not |
 | **graphTooltip** | 0 for no shared crosshair or tooltip (default), 1 for shared crosshair, 2 for shared crosshair AND shared tooltip |
-| **rows** | row metadata, see [rows section](#rows) for details |
 | **time** | time range for dashboard, i.e. last 6 hours, last 7 days, etc |
 | **timepicker** | timepicker metadata, see [timepicker section](#timepicker) for details |
 | **templating** | templating metadata, see [templating section](#templating) for details |
@@ -75,39 +76,6 @@ Each field in the dashboard JSON is explained below with its usage:
 | **version** | version of the dashboard (integer), incremented each time the dashboard is updated |
 | **links** | TODO |
 
-### rows
-
-`rows` field consists of an array of JSON object representing each row in a dashboard, such as shown below:
-
-```json
- "rows": [
-    {
-      "collapse": false,
-      "editable": true,
-      "height": "200px",
-      "panels": [],
-      "title": "New row"
-    },
-    {
-      "collapse": true,
-      "editable": true,
-      "height": "300px",
-      "panels": [],
-      "title": "New row"
-    }
-  ]
-```
-
-Usage of the fields is explained below:
-
-| Name | Usage |
-| ---- | ----- |
-| **collapse** | whether row is collapsed or not |
-| **editable** | whether a row is editable or not |
-| **height** | height of the row in pixels |
-| **panels** | panels metadata, see [panels section](#panels) for details |
-| **title** | title of row |
-
 #### panels
 
 Panels are the building blocks a dashboard. It consists of datasource queries, type of graphs, aliases, etc. Panel JSON consists of an array of JSON objects, each representing a different panel in a row. Most of the fields are common for all panels but some fields depends on the panel type. Following is an example of panel JSON representing a `graph` panel type:
@@ -266,16 +234,8 @@ Panels are the building blocks a dashboard. It consists of datasource queries, t
         },
 ```
 
-Usage of each field is explained below:
-
-| Name | Usage |
-| ---- | ----- |
-| TODO | TODO |
-
 ### timepicker
 
-Description: TODO
-
 ```json
 "timepicker": {
     "collapse": false,
@@ -416,7 +376,3 @@ Usage of the above mentioned fields in the templating section is explained below
 | **refresh** | TODO |
 | **regex** | TODO |
 | **type** | type of variable, i.e. `custom`, `query` or `interval` |
-
-### annotations
-
-TODO