Improve the UI for choosing your Log Levels

[stuartc]

With the recent addition of being able to filter logs when viewing runs, the current UI isn't as great as we'd like it to be.

It would be better if the settings were a drop down instead of a modal.

This was the original idea but there were some difficulties with positioning this inside the LogView. But we'd still like to have a dropdown instead of a modal.

We'd like to use a dropdown like what we have on the History page, or the pop-out on the User profile (top right of every screen).

Existing

Additional context

I've mentioned in other conversations that maybe this is the time we add a bar across the top of the Monaco component, and have a "Logs" item (similar to how the Chrome debugger works, and similar to how VSCode looks).

There is a concern around scaling and screen real estate, which leads to another more significant consideration - the application (especially in the editor) scales very poorly for smaller screens.

[midigofrank]

There is a bug on the step highlighter. Might just fix it in this issue