Update repo on back and forward navigation

[NereusWB922]

Summary:

Fixes #321

Type of change:

• 🐛 Bug Fix

Changes Made:

• Implement method to initialize repo from url params
• Call it when encounter popstate event (when back or forward button clicked)

Proposed Commit Message:

Update repository on back and forward navigation.

IssueViewer's repository is not updated when navigating back or forward
in the URL history. This will lead to inconsistency between the URL
parameters and the application state.

Let's ensure that IssueViewer's repository is updated on back and forward
navigation.

[Arif-Khalid]

LGTM!

[nknguyenhc]

LGTM!