UI sidebar fix

[pranavkparti]

Description

Issues with the sidebar menu are fixed.

What kind of change(s) does this PR introduce?

• Enhancement
• Bug fix
• Refactor

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Issue

What is the current behavior?
The sidebar has the following issues:

• When Open:
  • The sidebar is unnecessarily wide
  • The font color makes the highlighted menu item difficult to see
    
• When Closed:
  
  • The icons are not aligned in the center of the sidebar

What is the new behavior?
The issues are fixed.

Breaking change

Does this PR introduce a breaking change?
No.

Other useful information

None.