[#3444] Add keyboard shortcut update functionality

[karanBRAVO]

This PR adds the Edit button in keyboard shortcut modal, so that users can change the keyboard shortcuts.

Fixes #3444

Changes:

• Add the edit button
• creates the context to share keyMaps and updateKeyMaps function

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123

[karanBRAVO]

Hello @raclim,
What are your suggestions and feedback? Let me know if there's any issue.

One more thing to say, this PR is not yet completed, I have to add the same thing for all shortcuts.

[raclim]

Thanks for the update on this!

I shared my thoughts about the development for this issue in its thread. Ideally, a pull request should be complete before submission. Since it's not complete yet, could you mark this as a draft instead?

[karanBRAVO]

Hello @raclim,
I have updated the PR, need your reviews :)