thick white border instead of usual hard-to-notice border about windows-10-fluent-dark HOT 6 CLOSED

that is intentional and in accordance with Microsoft's styling for focused buttons for Metro apps:

if you want to manually remove that styling, I can provide assistance

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Thank you for your active involvement. I'm so content using this theme, best I found till for me.

Styling for focused buttons: Now I understood and find it okay and useful.

But I see some problems while switching it via tab button in gnome system monitor. Rectangle over 'processes' and 'resources' have only 3 white sides, next three selections are good as shown in gif, selection over the process named xfwm4 is not white at all [that may be intentional/exception for that type of area though, is that so?], and the last two selections of 'end process' and another icon [whose tool tip says 'show process properties'] has only one side as white as shown below.

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It's caused by the way GTK draws controls. Basically, a child control can't be drawn outside of its parent's boundaries. But to have the intended effect, I had to offset by 2px, so it "fails" to draw some parts of the outline.

I had another look at what grouped buttons look like without the highlight:

there should actually be spacing between button. I should rework the buttons, probably in a short time.

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selection over the process named xfwm4 is not white at all [that may be intentional/exception for that type of area though, is that so?]

it is intentional. Only the buttons and text entries (if I remember correctly) are supposed to have that outline style

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c1fa436 corrects this issue

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Wow, thanks a lot, it's even more awesome now.

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