Reasons for creating this PR

Width of changes tab Vue component does not react to window resizing , this PR fixes that.

Link to relevant issue(s), if any

• Part of Epic: New and Deprecated Sidebar Tab #1735

Description of the changes in this PR

• Add event listener to changes tab component for window resizing

Addresses requirement 22 in #1735

Known problems or uncertainties in this PR

Checklist

• phpUnit tests pass locally with my changes
• I have added tests that show that the new code works, or tests are not relevant for this PR (e.g. only HTML/CSS changes)
• The PR doesn't reduce accessibility of the front-end code (e.g. tab focus, scaling to different resolutions, use of .sr-only class, color contrast)
• The PR doesn't introduce unintended code changes (e.g. empty lines or useless reindentation)