Log Message:
Update to 1.2.30

Changelog:
Release 1.2.30 - October 23, 2011
This is a mixed bugfix and feature release.

Bugs fixed:
- Better explanation of the automatic import and export of Todo.txt format in
  the preferences dialog. (SF#3418906)
- The task viewer in list mode now also shows the categories, prerequisites
  and dependencies inherited from parent tasks, between parentheses. In
  addition, the inherited categories, prerequisites or dependencies are taken
  into account when sorting by categories, prerequisites or dependencies.
  (SF#3414914)
- Don't reset the percentage complete to 0 when the user changes it from 100
  to some other percentage less than 100.
- Fix a memory leak when opening edit dialogs.

Features added:
- The task viewer in list mode now also shows the categories, prerequisites
  and dependencies inherited from parent tasks, between parentheses. In
  addition, the inherited categories, prerequisites or dependencies are taken
  into account when sorting by categories, prerequisites or dependencies.
  (http://uservoice.com/a/ksD1q)
- Percentage complete, hourly fee and fixed fee of tasks can be edited in
  place.