hideShadowed option for config.macros.toolbar.createCommand

[BobMcElrath]

Allow commands to have the option "hideShadow" which will cause that command to not be shown on shadow tiddlers. (That is tiddlers that are shadow-only -- i.e. no modified version in the store)

This is applicable to any operation you wouldn't want to perform on a shadow tiddler, maybe mostly for server-sides. I want to use it for "show revisions" (which doesn't make sense for a shadow tiddler). But it could also be applied to other things one might want to do like "refresh", "revert/undo", etc.

 http://trac.tiddlywiki.org/tiddlywiki/changeset/676

[SaqImtiaz]

This already exists in the core and must have been implemented at some other time.