Cycle layout popup appears on primary monitor only

**Describe the bug**

The cycle layout popup, triggered by keyboard shortcut, is displayed on the primary monitor, even when the focused window is on a secondary monitor such that the layout change applies to that secondary monitor

**To Reproduce**
Steps to reproduce the behavior:
1. Set a keybinding for "Cycle layouts" in Tiling Shell settings
2. Focus a window on a secondary monitor
3. Use keybinding to cycle layouts
4. Observe the "Cycle layouts" popup appearing on the primary monitor, although the layout change does indeed apply to the secondary monitor.

**Screenshots**

**Information (please complete the following):**
- Tiling Shell version: v17.3 installed from extensions.gnome.org
- GNOME version: 50.0

**Additional context**

I'm on an up-to-date Arch Linux