When I hit "Find All", nothing special really happens - only the first hit is found and other occurrence are highlighted if visible on the screen.
"Find All" should behave like "Search in Files" but limited to the current editor window or all open ones (or all within one connection). That is: display found results (full line with line # and filename if searched multiple files) in a separate, dockable window (like "Messages" etc) with clickable results.