a popup `tip', as can happen when running x11/unclutter and leave the
mouse over an item with a tip; the tip is displayed, the mouse hides,
and now pck-timer doesn't barf when the mouse reappears.
Fix from Ben Elliston, who knows much more tcl than I do.
Project Clock lets you record the time you spend on different tasks
with a single mouse click. It is easy to add and delete projects. An
included utility generates reports.
