Enable Pixel Snap by default in the 2D editor

Since this avoids accidentally placing 2D nodes at subpixel positions,
this results in more crisp visuals by default, even when pixel snapping
is disabled in the project settings.

editor/plugins/canvas_item_editor_plugin.cpp

@@ -5204,7 +5204,9 @@ CanvasItemEditor::CanvasItemEditor(EditorNode *p_editor) {
 	snap_rotation = false;
 	snap_scale = false;
 	snap_relative = false;
-	snap_pixel = false;
+	// Enable pixel snapping even if pixel snap rendering is disabled in the Project Settings.
+	// This results in crisper visuals by preventing 2D nodes from being placed at subpixel coordinates.
+	snap_pixel = true;
 	snap_target[0] = SNAP_TARGET_NONE;
 	snap_target[1] = SNAP_TARGET_NONE;