I would also find this feature useful. I came from another text editor that had this and I miss it in Geany.
My use-case is that I hit Ctrl-f to bring up the Find dialog, then type a word and hit Enter continuously to iterate through the matches in the document. I don't use/need the Message window.
Currently as I hit Enter to iterate through the matches, I don't know where I am. Is the current highlighted word one of only a few matches, or one of hundreds? Even if I know how many matches there are in total (using the Find All > Mark button), I still don't know whether the current highlighted word is at the beginning, end or middle of that group of matches.
Instead, it'd be nice if the current and total matches were displayed in the statusbar. E.g. `2/5 matches`, `4/5 matches`, `1/5 matches (search wrapped)`. That way, as I iterate through the matches I know exactly where I am, how many matches there are remaining before the end of the document, etc.