Wrong window position under Wayland with HiDPI

Guake window opens to full desktop when triggered via shortcut. Then, after resizing the window with Ctrl+↑, it jumps to the right (effectively leaving a part of the window outside of the screen) but resizes to the correct height. Closing and reopening the window triggers the issue again.

Please see the following screencast, where I press, in sequence:

```
Toggle (x3)
Ctrl+↑ (x3)
Ctrl+↓ (x2)
Toggle (x2)
Ctrl+↑
Ctrl+↓
Toggle
```

[](https://www.youtube.com/watch?v=ThQliRyA7qI)

Note that in my configuration, `Toggle` is configured as `guake-toggle` in GNOME settings.

**Expected behavior**

Behaviour should be identical to when the one from an X session. Note that I have not experienced the same issues when running under X with HiDPI.

**Actual behavior**

Window position and size change in unintended ways.

**To Reproduce**

Launch Guake under Wayland on a HiDPI laptop monitor.

-------------------------------------------------------------------------------

$ guake --support

Guake Version: 3.6.3

Vte Version: 0.58.2

Vte Runtime Version: 0.58.2

--------------------------------------------------
GTK+ Version: 3.24.12

GDK Backend: __gi__.GdkWaylandDisplay

--------------------------------------------------
Desktop Session: gnome

--------------------------------------------------
Display: wayland-0

RGBA visual: True

Composited: True

* Monitor: 0 - SDC 0x414a
* Geometry: 3840 x 2160 % 2 at 0, 0
* Size: 340 x 190 mm²
* Primary: False
* Refresh rate: 60.00 Hz
* Subpixel layout: unknown