[SIEM] Fixes broken maps link to Kibana index management (elastic#73757…

…) (elastic#73846)

## Summary

Embarrassing simple fix 

If you don't have an index setup like below and click configure index patterns it takes you to `/app/kibana` when it should just be `/app` and there shouldn't be anymore hashes of `#`.

<img width="1487" alt="Screen Shot 2020-07-29 at 5 09 10 PM" src="https://user-images.githubusercontent.com/1151048/88862759-4b90e580-d1be-11ea-834c-aedc73cc330a.png">

x-pack/plugins/security_solution/public/network/components/embeddables/index_patterns_missing_prompt.tsx

@@ -13,7 +13,7 @@ import * as i18n from './translations';
 
 export const IndexPatternsMissingPromptComponent = () => {
   const { docLinks } = useKibana().services;
-  const kibanaBasePath = `${useBasePath()}/app/kibana`;
+  const kibanaBasePath = `${useBasePath()}/app`;
 
   return (
     <EuiEmptyPrompt
@@ -29,7 +29,7 @@ export const IndexPatternsMissingPromptComponent = () => {
               values={{
                 defaultIndex: (
                   <a
-                    href={`${kibanaBasePath}#/management/kibana/settings`}
+                    href={`${kibanaBasePath}/management/kibana/settings`}
                     rel="noopener noreferrer"
                     target="_blank"
                   >
@@ -61,7 +61,7 @@ export const IndexPatternsMissingPromptComponent = () => {
       }
       actions={
         <EuiButton
-          href={`${kibanaBasePath}#/management/kibana/indexPatterns`}
+          href={`${kibanaBasePath}/management/kibana/indexPatterns`}
           color="primary"
           target="_blank"
           fill