App-navigation without settings should not have padding-bottom

[jancborchardt]

Since #app-settings is inside #app-navigation, we can not do this via CSS. We probably need to add a class ».without-app-settings« to the #app-navigation via JS when there’s no settings, and then via CSS:

#app-navigation.without-app-settings {
   padding-bottom: 0;
}

cc @BernhardPosselt @nextcloud/designers @nextcloud/javascript

[MorrisJobke]

Fix is in #2283