Disable reload on specific pages

[AdrienLemaire]

Hi, and many thanks for maintaining this plugin, this boosted my productivity :)

I usually have plenty of pages open for my project (CMS, admin, etc) unrelated to the page I'm currently working on (frontend css), and livereload keeps reloading all of the pages on each modification, which puts a lot of stress on the CPU.
Could we have a shortcut to disable reload on the page? or a small ui settings tooltip to configure that? A no-brainer for the user would be to only reload the page currently active, but that's probably not trivial to implement.

Thanks for considering this feature!