Bug in status window

[dpage]

I found a bug in the status window. When the activity lines are refreshed, it tries to update them in place, to avoid removing and
re-adding every line. That doesn't work if the rows are sorted using the column headers on the list view, and results in blank lines replacing existing ones. Or at least, that appears to be whats happening.

[gleu]

Fixed in r8273 and done in r8274.

Fix the status server window on Mac OS X, per a report from Dave.

In branch 1.10, we fix it by disabling the native behaviour of the listview. Which means we disabled the ordering functionality.

In trunk, we fix it by enabling our own ordering functionality (but still disable the native behaviour of the listview on Mac OS X).

Fixes #168.