New app icon
Disable system tray messages on Linux
Revise the app icon
Revise the tray icon
Make the 32x32 app icon more detailed
Disable the whole system tray on Linux
cute: less prominent shadow
Remove slight bottom border in app icons
Simplify the tree navigation logic

Next or previous active means the next or previous active, not
the next or previous active in some twisted priority order. ;)
Fix TreeWidget::moveToMostActiveItem()
TreeDelegate: don't highlight headers - looks awful

TODO: find another way to present highlights in collapsed networks
Make it possible for plugins to specify libcommuni modules
WIP: quassel support