Fix dark theme bugs

Updates #5375

Squashed commit of the following:

commit 40666b010697381e11b3a36d9c2ed1c1507f27ed
Author: Arseny Lisin <a.lisin@adguard.com>
Date:   Tue Jan 31 18:34:06 2023 +0200

    Review fix

commit 44f3d6095bc9b426e8142f8c9d915a1441f3d791
Author: Arseny Lisin <a.lisin@adguard.com>
Date:   Tue Jan 31 17:02:38 2023 +0200

    Clear

commit 44274ba54c9ff2bd2caf5fa69bf06c587f8858e5
Author: Arseny Lisin <a.lisin@adguard.com>
Date:   Tue Jan 31 13:25:01 2023 +0200

    Clear

commit 8b48c523cbbe3f73160331a9c516388c7965a7a2
Author: Arseny Lisin <a.lisin@adguard.com>
Date:   Tue Jan 31 12:14:37 2023 +0200

    Review fix

commit 3b8cd94cdd8d3fc90cdc27053964489414055cc9
Author: Arseny Lisin <a.lisin@adguard.com>
Date:   Mon Jan 30 16:13:15 2023 +0200

    Fix query log popup bg

commit 14d4c87164200f7c918bac02c9cc5f1cffb83932
Author: Arseny Lisin <a.lisin@adguard.com>
Date:   Mon Jan 30 15:03:06 2023 +0200

    revert icons

commit 98b042726e1510f85c9cf5a4caba2d56885f120b
Author: Arseny Lisin <a.lisin@adguard.com>
Date:   Mon Jan 30 14:45:35 2023 +0200

    Fix dark theme bugs

client/src/components/ui/Line.js

@@ -25,9 +25,9 @@ const Line = ({
         theme={{
             crosshair: {
                 line: {
-                    stroke: 'black',
+                    stroke: 'currentColor',
                     strokeWidth: 1,
-                    strokeOpacity: 0.35,
+                    strokeOpacity: 0.5,
                 },
             },
         }}