macOS Console UI Improvements

[AvdLee]

The current filtering of the Console View happens via the toolbar search field. Following macOS standards, this is a bit odd. Normally, like in Xcode, you filter inside the list using a footer bar:

This also allows us to move the error filter to a more logical place at the bottom right corner, as well as the "is now"-mode button (the clock)

• Move search field to toolbar in console view
• Move "errors only" button to toolbar
• Create a filter button inside the toolbar
• Move the "Is now mode" to the toolbar

@kean let me know if this makes sense to you and I'll add this to my roadmap.