Always use the first one for panel and lockscreen

This wraps GtkWindow based layer surfaces in proper objects.

This does not yet work for objects using GtkBuilder since we can't pass
in the output and layer-shell there.

To indicate the sliding direction

Don't assume the panel is always on the first monitor. This fixes the
menu position of the settings menu with two displays.

There were some fixes regarding xdg popup positioning.

This makes using rootston via keyboard a bit more comfortable

so we don't have to remember the options

Since the g_signal_emit() is not at the very end of the function one of
the listeners might free the lockscreen widget when receiving the
"lockscreen-unlock" signal. Hold a reference to prevent being cleaned up
before being done.

It's a boolean, not a string

Harmless now but might prevent future errors

Use
   EXEC=valgrind _build/run

This will be moved into an indicator at a later point.

Fixes #20

This makes debugging way simpler

This makes sure the correct output transform is applied to absolute
cursor coordinates when a display is rotated. Needed to make touch
working on rotated displays. See

    https://github.com/swaywm/wlroots/pull/935

for the discussion.

This one has the necessary fixes for the lock screen.

The lock screen now shows the current time and on upward drag it
switches to the lock screen. The lock screen then shows a keypad to
unlock the screen.

Validating the entered pin will be done in a follow up patch.

TODO in future patches:
 - slide up lock surface when swiping
 - wiggle pane a little if swipe is too soft
 - alpha blend out lock screen surface

It's a stupid stub.

It's one of the core applications

This on is in Adwaita so we don't need gnome-icon-theme.

for the terminal icon