Caused by "app.config_reload" in the control center. Changing a value,
reloading, and then chaning it again and reloading -> segfault

* Moved control center notifications into its own widget + vexpand config option

* Fixed cc max size not being respected

All the widgets now have the same padding and margins

Makes it easier to override variables like border radius without
recompiling the original SCSS

* Always use the default GTK theme to allow for a more consistent theming experience

* Default to USER CSS priority

* Added --hide-all option

* Use close_all_notifications method instead of while-loop

---------
Co-authored-by: Erik Reider <35975961+ErikReider@users.noreply.github.com>

* Add preferred output config option

* Added swaync-client command to set a temporary output

* Updated man pages

* Fixed linting complaints

* Updated README

* Make notification grouping optional (#376)

* Renamed the option to notification-grouping

---------
Co-authored-by: Erik Reider <35975961+ErikReider@users.noreply.github.com>

* hints: parse sound-name and sound-file

* Added docs

---------
Co-authored-by: Erik Reider <35975961+ErikReider@users.noreply.github.com>

* utils: expand `~` on execute_command()

* feat: add widget slider

* slider: queue setter to avoid racing

* slider: queue get to avoid possible racing with set

* slider: doc sync

* slider: avoid dead loop on queue_get(), just in case

* slider: expand cmd with predefined pattern

* Ported slider to GTK4

* Added CSS to match the other widgets

* Updated doc with information about "$value"

---------
Co-authored-by: Erik Reider <35975961+ErikReider@users.noreply.github.com>

Co-authored-by: Gabriele Musco <gabmus@disroot.org>

Older versions of gtk4-layer-shell produce a Wayland protocol error

* Moved Notification icon sizes to CSS

* Added Notification group app icon size to CSS

* Moved MPRIS icon sizes to CSS

* Moved Volume widget icon sizes to CSS

* Added initial AnimatedList and Item Widgets

* Use the new list in the NotificationWindow class + massive list improvements

This includes a more simplified way of calculating the item positions
relative to the fade threshold

* Added center animations

* Fixed replacing notification not scrolling to the new position (top/bottom)

* Simplified size_allocate y offset

* Fixed very large notifications fading before reaching top with small list size

* Disable card animation if GTK animations are disabled

* Removed unneeded TODO about allocation order

* Fixed input region including the fade padding

The activate signal would be called again if another instance of swaync
would start, resulting in a crash due to trying to own the dbus name