[Kibana] Update the "Edit a dashboard" procedure (elastic#3481)

This PR:
- Aligns the text with the current UI
- Removes animated GIFs 

Relates to elastic#3214

### Note for the reviewers

The animated GIFs on this page are obsolete and add little value to the
procedure. I decided to remove them for now, in consideration of the
following factors:
- The UI is going to change again in 9.3 
- I still don't have access to ContentStack, where animated GIFs should
be stored

---------

Co-authored-by: florent-leborgne <[email protected]>

Author: 2 people

explore-analyze/dashboards/open-dashboard.md

@@ -17,32 +17,25 @@ products:
    When looking for a specific dashboard, you can filter them by tag or by creator, or search the list based on their name and description. Note that the creator information is only available for dashboards created on or after version 8.14.
    ::::
 
-3. Click the dashboard **Title** you want to open.
-4. Make sure that you are in **Edit** mode to be able to make changes to the dashboard. You can switch between **Edit** and **View** modes from the toolbar.
-   ![Switch between Edit and View modes](https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/blt619b284e92c2be27/6750f3a512a5eae780936fe3/switch-to-view-mode-8.17.0.gif)
+3. Click the dashboard name you want to open.
+   The dashboard opens automatically in **Edit** mode if you have the right permissions. You can switch between edit and view modes from the toolbar.
 
 5. Make the changes that you need to the dashboard:
 
     * Adjust the dashboard’s settings
     * [Add, remove, move, or edit panels](../visualize.md#panels-editors)
     * [Change the available controls](add-controls.md)
 
-6. **Save** the dashboard. You automatically switch to **View** mode upon saving.
+6. **Save** the dashboard.
 
 ::::{note}
 Managed dashboards can’t be edited directly, but you can [duplicate](duplicate-dashboards.md) them and edit these duplicates.
 ::::
 
-
 ## Reset dashboard changes [reset-the-dashboard]
 
-When editing a dashboard, you can revert any changes you’ve made since the last save using **Reset dashboards**.
+When editing a dashboard, you can revert any changes you’ve made since the last save using the **Reset** button in the toolbar.
 
 ::::{note}
 Once changes are saved, you can no longer revert them in one click, and instead have to edit the dashboard manually.
-::::
-
-
-1. In the toolbar, click **Reset**.
-2. On the **Reset dashboard?** window, click **Reset dashboard**.
-   ![Reset dashboard to revert unsaved changes](https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/blte0c08bede75b3874/6750f5566cdeea14b273b048/reset-dashboard-8.17.0.gif)
+::::