Option for reloading the theme on custom change

Brief: Toggle reloading of the active theme when an option is changed through the Custom UI.

Symbol: modus-themes-custom-auto-reload (‘boolean’ type)

Possible values:

1. nil
2. t (default)

All theme user options take effect when a theme is loaded. Any subsequent changes require the theme to be reloaded.

When this variable has a non-nil value, any change made via the Custom UI or related functions such as customize-set-variable and setopt (Emacs 29), will trigger a reload automatically.

With a nil value, changes to user options have no further consequences: the user must manually reload the theme (Enable and load).