Implement dropdown menu for repo change

[NereusWB922]

Summary:

Fixes #344

Type of change:

• ✨ Enhancement

Changes Made:

• Implement dropdown menu for repo change
• Provide a button for add new repo
• Provide a filter icon button to enable keep filter

Repo change with keep filter on

Repo change with keep filter off

Add new repo

Proposed Commit Message:

Implement dropdown menu for repo change

Introduce a dropdown menu for repository selection,
simplifying the process of switching between repositories. 

This enhancement offers users a quicker and more
intuitive method to navigate to previously visited repositories. 

[nknguyenhc]

LGTM! Very clean.