Replaces screenshots for net verification feature

The previous ones had poor quality.
This commit fixes the problem and provides
a small note in Deploy subsection.

Related-Bug: 1415520

Change-Id: Ibd5ac69db15a589ee7e746f8c95e6e7a835a3422

pages/user-guide/5000-deploy-environment.rst

@@ -35,3 +35,10 @@ or by checking individual node logs in the **Logs** tab.
 
 .. include:: /pages/user-guide/stop_reset/0200-stop-deploy-ui.rst
 .. include:: /pages/user-guide/stop_reset/0500-reset-environment.rst
+
+Note, that beginning with Fuel 6.1, the Fuel web UI
+displays warnings if you try to press **Deploy** button
+with network verification in progress, failed or
+skipped. See :ref:`Verify networks <verify-networks-ug>` for
+more details and screenshots.
+

pages/user-guide/config-environment/3400-verify-networks.rst

@@ -37,17 +37,17 @@ message should appear.
    from the checklist.
 
 Beginning with Fuel 6.1, if you press **Deploy** button
-without verifying network, the Fuel web UI will display a warning.
+the Fuel web UI will prevent you from deploying the
+environment in three cases:
 
-.. image:: /_images/user_screen_shots/verify-network-warning.png
+* you have not verified networks at all:
 
-When deploying an environment with
-network verification in progress, you will also get
-a warning.
+  .. image:: /_images/user_screen_shots/verify-network-warning.png
 
-.. image:: /_images/user_screen_shots/net_verify_in_progress.png
+* your network verification is in progress:
 
-If you try to deploy an environment with failed network verification,
-the Fuel web UI will display a warning.
+  .. image:: /_images/user_screen_shots/net_verify_in_progress.png
 
-.. image:: /_images/user_screen_shots/net_verify_failure-warning.png
+* your network verification failed:
+
+  .. image:: /_images/user_screen_shots/net_verify_failure-warning.png