Trims user provided group name

editor/groups_editor.cpp

@@ -215,7 +215,7 @@ void GroupDialog::_group_renamed() {
 		return;
 	}
 
-	String name = renamed_group->get_text(0).strip_edges();
+	const String name = renamed_group->get_text(0).strip_edges();
 	for (TreeItem *E = groups_root->get_children(); E; E = E->get_next()) {
 		if (E != renamed_group && E->get_text(0) == name) {
 			renamed_group->set_text(0, selected_group);
@@ -232,6 +232,8 @@ void GroupDialog::_group_renamed() {
 		return;
 	}
 
+	renamed_group->set_text(0, name); // Spaces trimmed.
+
 	undo_redo->create_action(TTR("Rename Group"));
 
 	List<Node *> nodes;
@@ -254,8 +256,8 @@ void GroupDialog::_group_renamed() {
 		undo_redo->add_undo_method(this, "_delete_group_item", selected_group);
 	}
 
-	undo_redo->add_do_method(this, "_rename_group_item", selected_group, renamed_group->get_text(0));
-	undo_redo->add_undo_method(this, "_rename_group_item", renamed_group->get_text(0), selected_group);
+	undo_redo->add_do_method(this, "_rename_group_item", selected_group, name);
+	undo_redo->add_undo_method(this, "_rename_group_item", name, selected_group);
 	undo_redo->add_do_method(this, "_group_selected");
 	undo_redo->add_undo_method(this, "_group_selected");
 	undo_redo->add_do_method(this, "emit_signal", "group_edited");
@@ -550,8 +552,8 @@ void GroupsEditor::_add_group(const String &p_group) {
 	if (!node)
 		return;
 
-	String name = group_name->get_text();
-	if (name.strip_edges() == "")
+	const String name = group_name->get_text().strip_edges();
+	if (name.empty())
 		return;
 
 	if (node->is_in_group(name))