Built-in profiles conflict with user configuration

[itshog]

As stated in the wiki, the new brightness module ships with default profiles which set the icon according to the percentage. This seems to override the user-specified format property: in particular, my use case is showing the number without the percentage symbol (I use a vertical bar, so having the "%" symbols takes up unnecessary space and I find it quite ugly), but something like this doesn't work:

[[end]]
type = "brightness"
format = "{percentage}"
justify = "center"

[end.mode]
type = "systemd"
subsystem = "backlight"

In fact, I believe that the format option is overridden by the profiles which set the icons. Interestingly though I found out that the only way to override these profiles is by creating a new one for each of the levels mentioned in the wiki: for instance, something like the following only works when the percentage is exactly 30, everything below will still have the built-in formatting with the percentage symbol.

[[end]]
type = "brightness"
format = "{percentage}"
justify = "center"

[end.mode]
type = "systemd"
subsystem = "backlight"

[end.profiles.30]
when = 30
format = "\n{percentage}"

I hope this could be fixed, and thanks for the amazing project!

[JakeStanger]

Thanks for reporting. I was somewhat aware this was going to be a potential issue but I guess I underestimated it.

I think what we need is the ability to disable the defaults. There's a couple of potential solutions here that I see:

1. Setting any profiles yourself completely overwrites the defaults. So profiles = {} means you'd have a clean slate.
2. Keep the current merge behaviour, and add a use_default_profiles boolean option, which could be set to false to avoid merging in the defaults.

Additionally we might want to change the merge behaviour, although I'm struggling to see how that would help in this case. Ideas welcome though