Reduce splitter bar size to 5 in summary view

[adamint]

I reduced the bar size from 8 to 5 in summary view. It's still easy to land on. Let me know if it seems too thin

screenshot:

resolves #864

Microsoft Reviewers: Open in CodeFlow

[davidfowl]

Seems too thin

[adamint]

@davidfowl can you suggest a width

[JamesNK]

Better. I actually think it could be 1px thinner 😄

For a point of comparison, this is what a splitter looks like in the GitHub UI:

I don't think we should go quite that far.

[davidfowl]

Wait is that the border px, that's fine 😄

[drewnoakes]

Size looks good to me. Any smaller and it starts to become inaccessible to folks with fine motor control challenges.

Is the grip handle (little line inside the border) needed? That's not common in many UIs these days.

[adamint]

Is the grip handle (little line inside the border) needed? That's not common in many UIs these days.

It's part of the FluentSplitter component, so it's not really up to us whether we can remove it. fwiw, this is still a pattern used in Windows

[JamesNK]

Is the grip handle (little line inside the border) needed? That's not common in many UIs these days.

It's part of the FluentSplitter component, so it's not really up to us whether we can remove it. fwiw, this is still a pattern used in Windows

Removed with CSS - #1506