Fix deleting selection at the first line do not work with backspace

scene/gui/code_edit.cpp

@@ -614,6 +614,11 @@ void CodeEdit::_backspace_internal() {
 		return;
 	}
 
+	if (has_selection()) {
+		delete_selection();
+		return;
+	}
+
 	int cc = get_caret_column();
 	int cl = get_caret_line();
 
@@ -621,11 +626,6 @@ void CodeEdit::_backspace_internal() {
 		return;
 	}
 
-	if (has_selection()) {
-		delete_selection();
-		return;
-	}
-
 	if (cl > 0 && _is_line_hidden(cl - 1)) {
 		unfold_line(get_caret_line() - 1);
 	}