SVN commit 419283 by aseigo:

add .desktop files for the builtin buttons and show them in the add
applet dialog
make button AppletInfo drops to ContainerArea work
convert to using AppletInfo::List instead of AppletInfoList


 M  +4 -0      buttons/Makefile.am  
 A             buttons/bookmarks.desktop  
 A             buttons/browser.desktop  
 A             buttons/desktop.desktop  
 A             buttons/exec.desktop  
 A             buttons/kmenu.desktop  
 A             buttons/windowlist.desktop  
 M  +97 -1     core/containerarea.cpp  
 M  +5 -0      core/containerarea.h  
 M  +4 -4      core/pluginmanager.cpp  
 M  +3 -3      core/pluginmanager.h  
 M  +39 -15    ui/addapplet.cpp  
 M  +1 -1      ui/addapplet.h  
 M  +1 -1      ui/addapplet_mnu.cpp  
 M  +1 -1      ui/addapplet_mnu.h  
 M  +1 -1      ui/addextension_mnu.cpp  
 M  +1 -1      ui/addextension_mnu.h  
 M  +4 -2      ui/appletop_mnu.cpp  
 M  +2 -2      ui/appletwidget.h