add `mc fileout` and `gs fileout` commands ... aimed at providing fileout support that is compatible with saving source as .gs files
Issue #28: defined #menuActionSpec for all subclasses of TDClientListElementBuilder ... covers all keyboard shortcuts ... time to define the menuActionBlocks
Issue #28: start defining `menu actions` ... starting in TDClientListElementBuilder ..
Issue #28: finish initial foray into menus for tODE ... now that we've got menus, there are plenty of oppotunities to expand the menu items (and/or reorganize).... still need to do text window menus ..

Issue #33: continue/restart menu items available in debugger