Add 'id' column to all list pages
The internal ID of items is not visible anywhere in the web interface. The solution for #1028 will probably need that information when exporting data as the first step of an import cycle. Having the internal ID visible in the web interface will also make it easier to find items related to error messages in the log file (which may only display the ID).
Do we need to display the internal ID also on single-item view pages?