Very small default min window size in hyprland.

### Tested versions

v4.3.stable.arch_linux using hyprland wm

### System information

Godot v4.3.stable unknown - Arch Linux #1 SMP PREEMPT_DYNAMIC Wed, 14 Aug 2024 15:21:14 +0000 - Wayland - Vulkan (Forward+) - integrated AMD Radeon Vega 3 Graphics (RADV RAVEN) - AMD Ryzen 3 2200U with Radeon Vega Mobile Gfx (4 Threads)

### Issue description

In Godot editor, windows like "Create New Node", "Instantiate Child Scene", "About Godot", and any other besides de main editor window, starts with a very little size, then you need to manually resize it.

### Steps to reproduce

In Hyprland wm, launch Godot, open any project, then try to open any window, for example try to add a new node to the scene tree, or open Help ->"about godot".

### Minimal reproduction project (MRP)

May be any project, no one in particular.

Start by reproducing the issue in the Godot editor under Hyprland, opening secondary windows such as Create New Node or About Godot. Trace the editor's secondary-window creation and sizing behavior, then verify that these windows open at a usable default size without regressions in the listed dialogs.

Written by the indexing model from the issue text.