add app-dark.svg

[wonderfulShrineMaidenOfParadise]

img: add app-dark.svg

Dark version of app.svg from 18615eb

OCA\Passman\Notifier: setIcon()

Set the icon for the notification.

OCA\Passman\Settings: add AdminSection

Also rename the section from additional to passman.

[binsky08]

thanks for the pr, it looks quite interesting. I'll try to check it out soon^TM

[binsky08]

From a technical perspective I'm fine with it, already tested it and it works well. Thanks @wonderfulShrineMaidenOfParadise .

I am not sure about the new Passman settings section. Personally I like it, but the documentation says:

It is also possible that an app registers its own section. This should be done only if there is no fitting corresponding section and the app’s settings form takes a lot of screen estate. Otherwise, register to “additional”.

and well, our settings does not take "a lot of screen estate" and fits well in “additional”.
On the other hand, it would simplify finding the Passman settings at all.

@animalillo what would you say?