So, I want them all to have the same styling. Either mine, or built in. Icon style is a different issue, and if I can get the CSS/Appearance to be the same, then I can sort out the icons myself (I've got a pro membership to FA, so...)
Attached is the tiddler with my svg icon. Here's how I'm calling it: <$button class="tc-btn-invisible tc-image-button">[img[six]]</$button>
This should, theoretically, give me exactly the same styling as the built-in buttons. But it doesn't - nothing at all is visible. I've also tried transclusion as {{six}}, also no good.
As far as replacing existing buttons goes: on $:/core/images/info-button, I replaced the existing def with {{six}}, which worked, but none of the usual styling applied. Instead of muted colors and hover differences like the built in buttons, it's just black, no change on hover.
What I am doing wrong?