[UPDATED] Redirect Manager

Updated to v303.1

Release Notes:
- Confirmed: compatibility with OpenCart 3.0.3.x

- Fixed: "Warning: strpos(): Empty needle" error on the homepage
- Fixed: error when resetting or deleting all redirects
- Fixed: pagination not working on OpenCart 3 versions

- Updated: adjusted some code to help prevent redirect loops

Updated to v2022-7-25

Release Notes:
- NOTE: Starting with this release, version numbers will now be based on the date the new version is released.

- Added: compatibility with OpenCart 4.0.0.x

- Fixed: the "From" URL was sometimes detected as http even if it was https
- Fixed: redirecting a 404 URL wouldn't visually remove the row properly

- Updated: reloading the page will now automatically select the same tab
- Updated: "To" URLs are no longer forced as lowercase
- Updated: due to OpenCart 4.0 requirements for Events, the extension model file is now a controller file (you can delete the old model file after updating, but leaving it on the server will not cause any issues)

Updated to v2023-5-11

Release Notes:
- Added: compatibility with OpenCart 4.0.1.x - 4.0.2.x
- Added: new "Check For Updates" button with one-click update functionality

- Fixed: pagination bug from 4.0-related updates
- Fixed: issues with 404 URLs being recorded in OpenCart 4.0

- Updated: compatibility with other modifications that change the header file
- Updated: a URL-encoded version of the page URL is now checked if no results are initially found
- Updated: to reduce the number of 404 URL entries, duplicate URLs visited by the same IP address will now just update the original entry's info