more commands take `frame' as an argument
commands.js (redraw): removed (unimplemented) command and function.
commands.js (reinit, help_page, help-page, tutorial_page, help-with-tutorial)
(go_up, go-up, text_reset, text-reset, text_reduce, text-reduce)
(text_enlarge, text-enlarge, eval_expression, eval-expression)
(print_buffer, print-buffer, view_source, view_source, frameset-view-source)
(view_partial_source, view-partial-source, view_mathml_source)
(view-mathml-source): use `frame' arg instead of `this' object