Commits on Feb 4, 2020

1. [SIEM] Fixes Signals count spinner (elastic#56797) …

   ## Fixes an issue where the Signals count spinner can spin forever
   
   Per the animated gif below, in `7.6` `BC 4`, the `Signals count` spinner on the Overview page spins forever until the signals index is created (in the current Kibana space):
   
   ![signals-count-loading-spinner](https://user-images.githubusercontent.com/4459398/73785251-2ca42000-4754-11ea-8671-daa81f351c9b.gif)
   
   The `Signals count` spinner will spin forever until the user clicks the `Detections` tab, which-in turn creates the signals index (if it doesn't exist), per the animated gif below:
   
   ![create-signals-index](https://user-images.githubusercontent.com/4459398/73785319-4ba2b200-4754-11ea-9bb0-a745a8b2be5d.gif)
   
   This behavior is an issue because:
   
   - When a fresh deployment is created on Elastic Cloud, a user won't understand why the `Signals count` widget is always spinning on the `Overview` page. (The user must click the `Detections` page to resolve this.)
   - In deployments where authentication is disabled, or, for _reasons_, a Detections index will never be created, the `Signals count` spinner on the Overview page will always spin.
   
   To reproduce:
   
   1. Spin up a new `7.6` `BC 4` deployment on Elastic Cloud
   2. Login to Kibana for the first time
   3. Navigate to the SIEM app
   
   **Expected result**
   - All histograms on the Overview page eventually stop displaying their respective loading spinners
   
   **Actual result**
   - The `Signals count` widget spinner spins forever. (The user must click the `Detections` tab to create the signals index.)
   
   ## Deleting the signals index
   
   To reproduce the issue above when a signals index has already been created (by clicking on the Detections tab), run the following from the Kibana `Dev Tools` `Console`:
   
   ```
   DELETE /.siem-signals-default-000001
   ```
   
   It is also possible to reproduce this issue by creating a new space, because it won't have a signals index.
   
   elastic/siem-team#514

   

   andrew-goldstein committed Feb 4, 2020
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