Inspector: Add bit/value info to layer tooltip

Fixes #20213.

editor/editor_properties.cpp

@@ -617,9 +617,11 @@ void EditorPropertyLayers::setup(LayerType p_layer_type) {
 		}
 
 		if (name == "") {
-			name = "Layer " + itos(i + 1);
+			name = TTR("Layer") + " " + itos(i + 1);
 		}
 
+		name += "\n" + vformat(TTR("Bit %d, value %d"), i, 1 << i);
+
 		names.push_back(name);
 	}