Don't call interface attributes directly from plugins
Better align search options
Disable tasklist refresh when minimized to tray

Fixes #220
Move tasklist menus to a separate module
Tasklist: move filter buttons to menu

Fixes #243
Fix bug
Let configure time format
Deprecate delete dialog box

Fixes #239
Popup tree context menu also on empty areas

Fixes #42
Automatic placement of plugin menu items

Fixes #20
Fixes #151
Add comment
Add history context menu

Fixes #233
Simplify history window code and restyle it
Restyle borders
Fix and improve gtk theme adaptations
Let the rule maker scroll horizontally if the window is too narrow
Change create/paste item menu items dynamically

Fixes #43
Better show history status

Fixes #74
Tidy up event handling
Merge branch 'develop' into develop-links