I want to intercept plugin changes, but no action hook listed in the Action Reference seems to do it. I tried
after_switch_theme which is triggered only after changing from one theme to another, and
load_themes.php which is triggered when entering the "Appearance" page with the list of currently installed plugins.
Which action will be triggered after configuring a theme in customizer? Which action will be triggered when a file of a child theme is modified? Which action will be triggered when a theme was updated to a newer version?