Thanks for kind answers but over the past few days, the need has been solved and "replaced" by its greater context -
Article Tiddlers. Further kind assistance is appreciated over there instead.
That said;
@Danielo and @Tobias (Hi!!!)
A button would not replace the title in e.g the sidebar list. I want to be able to click one title, e.g in the sidebar lists, and have it open multiple tiddlers (now solved with ArticleTiddlers).
@pmario - Very interesting. If a title (anywhere) can really be a button, then I can imagine several cool things where we currently use non-sensical tiddlers that really only serve as place holders for buttons. One could search for "non direct keywords" and directly have a command seen in the search results list. (type in "store" and have "Save" "Upload" etc show). Would require some careful planning probably ;-)
<:-)