### Godot version

v4.0.1.stable.official [cacf49999]

### System information

Windows 10

### Issue description

If you use Sprite2D with a regular CompressedTexture and set a Region on it, then use a Sprite2D with a CanvasTexture and a different texture in the diffuse, and try to set a Region, the Region Editor display will show the texture from the first sprite2D node. I would expect it to show the diffuse texture from the current Sprite2D.
![image](https://user-images.githubusercontent.com/7292421/231493673-4eb152e0-81ed-4248-8465-71242c291cd2.png)
![image](https://user-images.githubusercontent.com/7292421/231493749-6173993b-e77c-4899-961e-9a055c07e351.png)




### Steps to reproduce

Make a sprite2D node
add a texture to it 
set Region to Enabled
click Edit Region under 'Region'
set any region

Make another sprite2D node
add a CanvasTexture to it
add a different texture to the Diffuse part
set Region to Enabled
click Edit Region under 'Region'
see wrong texture

### Minimal reproduction project

[RegionEditorBug.zip](https://github.com/godotengine/godot/files/11212626/RegionEditorBug.zip)

theme->set_color("drop_mark_color", "TabBar", tab_highlight);
	theme->set_icon("menu", "TabContainer", theme->get_icon(SNAME("GuiTabMenu"), SNAME("EditorIcons")));
	theme->set_icon("menu_highlight", "TabContainer", theme->get_icon(SNAME("GuiTabMenuHl"), SNAME("EditorIcons")));
	theme->set_icon("close", "TabBar", theme->get_icon(SNAME("GuiClose"), SNAME("EditorIcons")));
	theme->set_icon("increment", "TabContainer", theme->get_icon(SNAME("GuiScrollArrowRight"), SNAME("EditorIcons")));
	theme->set_icon("decrement", "TabContainer", theme->get_icon(SNAME("GuiScrollArrowLeft"), SNAME("EditorIcons")));
	theme->set_icon("increment", "TabBar", theme->get_icon(SNAME("GuiScrollArrowRight"), SNAME("EditorIcons")));
	theme->set_icon("decrement", "TabBar", theme->get_icon(SNAME("GuiScrollArrowLeft"), SNAME("EditorIcons")));
	theme->set_icon("increment_highlight", "TabBar", theme->get_icon(SNAME("GuiScrollArrowRightHl"), SNAME("EditorIcons")));
	theme->set_icon("decrement_highlight", "TabBar", theme->get_icon(SNAME("GuiScrollArrowLeftHl"), SNAME("EditorIcons")));
	theme->set_icon("increment_highlight", "TabContainer", theme->get_icon(SNAME("GuiScrollArrowRightHl"), SNAME("EditorIcons")));
	theme->set_icon("decrement_highlight", "TabContainer", theme->get_icon(SNAME("GuiScrollArrowLeftHl"), SNAME("EditorIcons")));
	theme->set_icon("drop_mark", "TabContainer", theme->get_icon(SNAME("GuiTabDropMark"), SNAME("EditorIcons")));
	theme->set_icon("drop_mark", "TabBar", theme->get_icon(SNAME("GuiTabDropMark"), SNAME("EditorIcons")));
	theme->set_constant("side_margin", "TabContainer", 0);
	theme->set_constant("outline_size", "TabContainer", 0);
	theme->set_constant("h_separation", "TabBar", 4 * EDSCALE);
	theme->set_constant("outline_size", "TabBar", 0);
	
	Ref<StyleBoxFlat> style_content_panel = style_default->duplicate();
	style_content_panel->set_border_color(dark_color_3);
	style_content_panel->set_border_width_all(border_width);
	style_content_panel->set_border_width(Side::SIDE_TOP, 0);
	style_content_panel->set_corner_radius(CORNER_TOP_LEFT, 0);
	style_content_panel->set_corner_radius(CORNER_TOP_RIGHT, 0);
	
	style_content_panel->set_content_margin_individual(margin_size_extra * EDSCALE, (2 + margin_size_extra) * EDSCALE, margin_size_extra * EDSCALE, margin_size_extra * EDSCALE);
	theme->set_stylebox("panel", "TabContainer", style_content_panel);
	
	Ref<StyleBoxFlat> style_bottom_panel = style_content_panel->duplicate();