The Midpoint Line tool previews the line from the cursor's mirror image through the middle to the cursor, which is what the second click commits. Fixes#1358.
Inscribed, circumscribed and edge polygon tools preview their actual outline (side count and orientation) while drawing, with the current line type, instead of only the support circle. Preview work is bounded. Fixes#520.
Co-authored-by: lillith <35337584+0xlillith@users.noreply.github.com>