Gander 1.6

Share and locate: a share icon in the viewer toolbar sends the open file to any app, and a new "Show in file manager" menu item opens the file's folder in the system Files app. The folder item appears when Gander can work out the file's real location (picker, folder browsing, Open-with, downloads, gallery); cloud files and shared text have no folder to show, so it stays hidden there. No other changes.