and may I give another sugestion. make a markdown version too. you could reuse most, an just make a markdown image link to put in the textfield instead of a wikitext image link.
like ![picture alt text](nameOfImageTiddler "Title is optional") -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/e3dd4e0c-7dda-417a-97cd-16db5afb0dde%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.