Certificate validation issues icon

**Is your feature request related to a problem? Please describe.**
Insomnia allows to work with different APIs.
Some of them can use valid certificates and some not (self signed, expired, ...).
Insomnia allows to disable certificates validation at all - it's an application wide setting.
In order to work with APIs which have some certificate issues it is needed to completely disable certificates validation.
But in this case there is no sign of certificate issue on API/request basis.
It's only possible to understand this analyzing the Timeline tab.

**Describe the solution you'd like**
It would be very nice to have a sign/icon in the response area which appears in case of certificate issues.
Like this:

Start by locating the response area and the Timeline tab in the Insomnia client, then trace how certificate validation problems are surfaced for an individual request. Determine how the response UI can expose that state without changing the application-wide setting. Done means requests with certificate issues show a visible icon or sign in the response area, with normal requests unchanged.

Written by the indexing model from the issue text.