fix(ui): align pop-up and settings dialog colors with dark blue theme

[ashish757]

Description

• added dark theme in some missing components of the website
• I redesigned the UI, I have used gray-800 instead of a black to match the existing grey-700 used by editor
• Made UI improvement to the active tab indicator in setting pop up.

Related issue(s)
Fixes #1256

BEFORE:

NOW:

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[Shurtu-gal]

@princerajpoot20 do we need this?

[princerajpoot20]

@Shurtu-gal Umm… I’m okay with either way...having it or not having it. What do you think?