Collapse ToolkitSampleRenderer header when in Tabbed mode

[niels9001]

In TabMode, users should not see the header of the page containing the title and description.

The VisualState to do this is part of #162, just needs the be wired up from code behind.

Edit swapped image with update for the header being discussed.

[michael-hawker]

For the documentation render for the tabbed mode, I think that's fine. I was talking about the header in the sample mode here actually:

I may have just been tagging comments wrong in the PR since there's multiple github buttons...

[niels9001]

For the documentation render for the tabbed mode, I think that's fine. I was talking about the header in the sample mode here actually:

I may have just been tagging comments wrong in the PR since there's multiple github buttons...

Yeah, that makes sense since we already have the sample name in the tab 👍

[michael-hawker]

Just going to post this thought here for now, but in documentation view, we could have a tooltip with the sample description. Maybe we can use that on the tab header itself here as well?