fix: menu widget bugs

[rot1024]

Overview

What I've done

Fixes:

• Icons don't be displayed
• Camera doesn't fly once flight button is clicked
• Warning from Markdown component
• "Undefined" page will open when url property is empty and button os clicked
• When menu text is CJK only, it breaks the line

What I haven't done

How I tested

Screenshot

Which point I want you to review particularly

Memo

[codecov]

Codecov Report

Merging #37 (40c7adc) into main (16f265a) will decrease coverage by 0.09%.
The diff coverage is 40.00%.

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
- Coverage   52.24%   52.15%   -0.10%     
==========================================
  Files          45       45              
  Lines         645      650       +5     
  Branches      125      125              
==========================================
+ Hits          337      339       +2     
- Misses        233      237       +4     
+ Partials       75       74       -1     

Impacted Files	Coverage Δ
src/components/atoms/Icon/index.tsx	56.25% <37.50%> (-10.42%)	⬇️
src/components/atoms/Markdown/index.tsx	56.52% <50.00%> (+1.97%)	⬆️

[HideBa]

LGTM 👍