Kibana: Stack Monitoring linking to logs UI without checking uiCapabilities

[kobelb]

The Stack Monitoring application is linking to the Logs application without checking the uiCapabilities. This will cause a 404 when the user doesn't have access to the Logs application, because it's either disabled using Spaces disabled features or the user doesn't have permissions to the Logs application. Instead, we should be conditionally rendering this link only when uiCapabilities.logs && uiCapabilities.logs.show is true.

[elasticmachine]

Pinging @elastic/stack-monitoring

[chrisronline]

Assigning to @igoristic to give him some more visibility into this feature.

@igoristic No rush in getting this in, but ping me if you have any questions