You can click anywhere on a line with a command mark to get command info as a submenu. Clicking in the margin gives you only command info
Fix bug that would cause jan 1 2000 timestamps. If one ever does sneak through just show an empty string, though that shoudln't happen.
Ignore alt-click on firstmouse, because that is defined by the OS as hiding the previous window when switching windows.
Change imgcat to accept an image on stdin. Inspired by PR 170 by Mathias Leppich