Highlight active tree and active node in comment tab

[normanrz]

Highlights the active tree and active node in the comment tab with a background color similar to the active tree in the tree tab.

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• Updated (unreleased) changelog
• Ready for review

[daniel-wer]

LGTM :) As far as I can see, this shouldn't interfere with comment links (#<node_id> to link to another node) as those links have the same blue color as the node id in front of comments which is also still visible 👍

[philippotto]

Looks good! However, the background color makes the suboptimal vertical alignment more prominent. Maybe this is easy to fix. If not, should be fine for now, too.

[normanrz]

Next round with adjusted centering.

I also increased the height of each comment entry to 24, which is the same as in the tree tab.
And, I removed the bold selected comment, because that is redundant with the colored background. wdyt?

[philippotto]

Great 🚀