Improve efficiency of saving and deleting issue models

[seetohjinwei]

Summary:

Fixes #188

Type of change:

• ✨ New Feature/ Enhancement
• 🎨 Code Refactoring

Changes Made:

• Remove duplicate usage of createIssueModel
  • in 80be52f
• Change updateLocalStore to take in an array of issues to avoid having to do O(n) loops for each issue
  • in 80be52f
• Change deleteIssuesFromLocalStore to directly update this.issues using delete keyword, remove currently unused deleteFromLocalStore
  • in 2531a1e

Screenshots:

N/A

Proposed Commit Message:

Improve efficiency of saving and deleting issue models

Previously, saving and deleting issues took up to O(n^2).

Let's
* Remove unnecessary loops to achieve O(n).

Checklist:

• I have tested my changes thoroughly.
• I have created tests for any new code files created in this PR or provided a link to a issue/PR that addresses this.
• I have added or modified code comments to improve code readability where necessary.
• I have updated the project's documentation as necessary.

[vigneshsankariyer1234567890]

Thank you for your PR! Nicely done 🔥

Changes are working well, so far LGTM 🚀 🚀 other than the small comments to resolve!

[vigneshsankariyer1234567890]

Approved :)