Updated formatting, make ErrorDialog class use HigMessageDialog, add
Updated formatting, make ErrorDialog class use HigMessageDialog, add

* src/Dialogs.cs: Updated formatting, make ErrorDialog class use
    HigMessageDialog, add support for header argument, do not use Run/Destroy
    to prevent UI hangs

stsundermann/banshee,dufoli/banshee,allquixotic/banshee-gst-sharp-work,lamalex/Banshee,GNOME/banshee,directhex/banshee-hacks,directhex/banshee-hacks,Dynalon/banshee-osx,arfbtwn/banshee,allquixotic/banshee-gst-sharp-work,arfbtwn/banshee,GNOME/banshee,ixfalia/banshee,Dynalon/banshee-osx,petejohanson/banshee,mono-soc-2011/banshee,mono-soc-2011/banshee,lamalex/Banshee,mono-soc-2011/banshee,petejohanson/banshee,stsundermann/banshee,eeejay/banshee,babycaseny/banshee,petejohanson/banshee,ixfalia/banshee,arfbtwn/banshee,directhex/banshee-hacks,GNOME/banshee,arfbtwn/banshee,GNOME/banshee,lamalex/Banshee,directhex/banshee-hacks,lamalex/Banshee,arfbtwn/banshee,Dynalon/banshee-osx,ixfalia/banshee,GNOME/banshee,Carbenium/banshee,allquixotic/banshee-gst-sharp-work,eeejay/banshee,lamalex/Banshee,Carbenium/banshee,stsundermann/banshee,Dynalon/banshee-osx,petejohanson/banshee,ixfalia/banshee,eeejay/banshee,GNOME/banshee,mono-soc-2011/banshee,babycaseny/banshee,Carbenium/banshee,eeejay/banshee,lamalex/Banshee,dufoli/banshee,directhex/banshee-hacks,stsundermann/banshee,allquixotic/banshee-gst-sharp-work,petejohanson/banshee,mono-soc-2011/banshee,babycaseny/banshee,mono-soc-2011/banshee,stsundermann/banshee,Carbenium/banshee,ixfalia/banshee,Dynalon/banshee-osx,stsundermann/banshee,dufoli/banshee,arfbtwn/banshee,stsundermann/banshee,dufoli/banshee,ixfalia/banshee,babycaseny/banshee,Dynalon/banshee-osx,Carbenium/banshee,ixfalia/banshee,directhex/banshee-hacks,babycaseny/banshee,arfbtwn/banshee,eeejay/banshee,Carbenium/banshee,dufoli/banshee,Dynalon/banshee-osx,dufoli/banshee,ixfalia/banshee,mono-soc-2011/banshee,babycaseny/banshee,dufoli/banshee,allquixotic/banshee-gst-sharp-work,arfbtwn/banshee,dufoli/banshee,Dynalon/banshee-osx,GNOME/banshee,stsundermann/banshee,babycaseny/banshee,babycaseny/banshee,allquixotic/banshee-gst-sharp-work,petejohanson/banshee,GNOME/banshee