fix: palette bugs

[BastinJafari]

Add missing adjustments for the theming object merge

PR checklist

Please tick all of the below (if a certain item is not required for this PR please tick the box anyway)

Docs

• [x] If you added new code; is it self documenting? (all the variable names clear, comments added where appropriate)
• [x] If you touched existing code; did you refactor existing naming, added comments where necessary?

Tests

• [x] If your ticket adds new functionality; have you added unit tests to verify behaviour?
• [x] If your ticket alters user interaction with the UI; have you added integration tests?
• [x] Do your tests check for every convievable user behabviour? (all behaviours the user can perform)

Typing

• [x] If you added new code; have you added typing?
• [x] If you touched existing code; have you improved its typing?

Styling

• [x] If new styles were created; Did you refactor/add more styles in css-in-js style?
• [x] Are all fonts, sizes, colours, margins, paddings in line with designs?
• [x] Did you perform a visual comparison of the implementation with the designs?

[codecov[bot]]

Codecov Report

Merging #328 (ef0c348) into master (2972d6c) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #328   +/-   ##
=======================================
  Coverage   66.85%   66.85%           
=======================================
  Files          62       62           
  Lines        1439     1439           
  Branches      218      218           
=======================================
  Hits          962      962           
  Misses        477      477           

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 2972d6c...ef0c348. Read the comment docs.