Ticket 220: Show/hide columns in frmStatus reports

Hi,

This patch allows a user to select which columns are visible in each
pane (but not the log one). The user only needs to right click on the
list's header, and it will show him a popupmenu with all the columns'
names displayed as checkable items. The unchecked ones aren't displayed
in the list. The state of the columns and their widths are stored in the
preferences file, so that they can be restored when the user will launch
the server status window later on.

Patch attached.

Comments?


--
Guillaume
 http://www.postgresql.fr
 http://dalibo.com