### Godot version

6ca1bf9589404b7643d8bf6cfb114dacf537f67b

### System information

PopOS 22.04 

### Issue description

The lines drawn to show what the UV1 or UV2 maps look like are way too thick and end up taking up the entire viewport. 

_Beta 13_
![Screenshot from 2023-01-18 13-18-38](https://user-images.githubusercontent.com/16521339/213297096-2e164dc7-355a-4266-821b-99ff21853a77.png)

_Master with a8cbb6245b53955883d8cbeee43524f7bf9fa4af reverted (looks the same in beta 12 and below_
![Screenshot from 2023-01-18 13-16-51](https://user-images.githubusercontent.com/16521339/213297100-415ffde1-972b-428f-b847-5aa64a32c7d2.png)

Regression introduced by https://github.com/godotengine/godot/pull/69851
cc @dalexeev 

Fix is probably going to be removing the editor scaling here: https://github.com/godotengine/godot/blob/6ca1bf9589404b7643d8bf6cfb114dacf537f67b/editor/plugins/mesh_instance_3d_editor_plugin.cpp#L463

### Steps to reproduce

Click on an object with at least a UV map then select "mesh > View UV1"

### Minimal reproduction project

Not project specific
ur->add_undo_method(node, "remove_child", nmi);
			ur->commit_action();
		} break;
		case MENU_OPTION_CREATE_OUTLINE_MESH: {
			outline_dialog->popup_centered(Vector2(200, 90));
		} break;
		case MENU_OPTION_CREATE_DEBUG_TANGENTS: {
			EditorUndoRedoManager *ur = EditorUndoRedoManager::get_singleton();
			ur->create_action(TTR("Create Debug Tangents"));
			MeshInstance3D *tangents = node->create_debug_tangents_node();
			if (tangents) {
				Node *owner = get_tree()->get_edited_scene_root();
				ur->add_do_reference(tangents);
				ur->add_do_method(node, "add_child", tangents, true);
				ur->add_do_method(tangents, "set_owner", owner);
				ur->add_undo_method(node, "remove_child", tangents);
			}
			ur->commit_action();
		} break;
		case MENU_OPTION_CREATE_UV2: {
			Ref<ArrayMesh> mesh2 = node->get_mesh();
			if (!mesh2.is_valid()) {
				err_dialog->set_text(TTR("Contained Mesh is not of type ArrayMesh."));
				err_dialog->popup_centered();
				return;
			}
			String path = mesh2->get_path();
			int srpos = path.find("::");
			if (srpos != -1) {
				String base = path.substr(0, srpos);