[rekonq] issues with favicons

[Ronny Scholz]

With current git, I have two issues with favicons:

The first one is that the general retrieval of favicons does not work. The 
favicon initialisation is done in Application::postLaunch(), but this is never 
called. It should be called in Application::mainWindow(), but only if there 
are currently no windows. This situation never occurs, because 
Application::newMainWindow() is always called before and already inserts a new 
window. I don't know how to fix this issue in an elegant way, so please help me 
with that :)

The second issue is that only the left half of the favicon is shown on the 
tabbar. The right half is overlayed by the tab text.
I have uploaded a screenshot with the kde favicon:
http://www.imagebam.com/image/da760e50084324

Greetings,
Ronny