[Solved] Heimdall not allowing background change after editing upload_max_filesize php.ini for NON-docker install

1. I'm not using Docker

2. I did a regular install in an LXC container with Apache

So I wanted to change Heimdall dashboard background to a file larger than 2M, but even after changing upload_max_filesize to 30M in /etc/php/7.4/apache2/php.ini, it still wouldn't take. 

After trying a bunch of other things, which of course none of them worked, I tried one more thing and that was to just peek inside /etc/php/7.4/cli. And what do you know, another php.ini file. 

I edited that, restarted Apache and also restarted heimdall. 

I was finally able to change the background to a file larger than 2M! Woot!