Fix remaining issues from mimetype icon rename

diff --git a/kmail/kmmimeparttree.cpp b/kmail/kmmimeparttree.cpp
index 4448cec..200e773 100644
--- a/kmail/kmmimeparttree.cpp
+++ b/kmail/kmmimeparttree.cpp
@@ -366,11 +366,11 @@
     setPixmap( 0, SmallIcon("folder") );
   } else if ( mimetype == "application/octet-stream" ) {
     setText( 1, i18n("Unspecified Binary Data") ); // don't show "Unknown"...
-    setPixmap( 0, SmallIcon("text-x-katefilelist") );
+    setPixmap( 0, SmallIcon("unknown") );
   } else {
     KMimeType::Ptr mtp = KMimeType::mimeType( mimetype );
     setText( 1, (mtp && !mtp->comment().isEmpty()) ? mtp->comment() : mimetype );
-    setPixmap( 0, mtp ? mtp->pixmap( TDEIcon::Small) : SmallIcon("text-x-katefilelist") );
+    setPixmap( 0, mtp ? mtp->pixmap( TDEIcon::Small) : SmallIcon("unknown") );
   }
 }
 
diff --git a/kmail/kmmsgpartdlg.cpp b/kmail/kmmsgpartdlg.cpp
index 2a0bd8c..869ee01 100644
--- a/kmail/kmmsgpartdlg.cpp
+++ b/kmail/kmmsgpartdlg.cpp
@@ -65,7 +65,7 @@
 
   // mimetype icon:
   mIcon = new TQLabel( plainPage() );
-  mIcon->setPixmap( DesktopIcon("text-x-katefilelist") );
+  mIcon->setPixmap( DesktopIcon("unknown") );
   glay->addMultiCellWidget( mIcon, 0, 1, 0, 0 );
 
   // row 0: Type combobox:
@@ -325,7 +325,7 @@
        == TQValidator::Acceptable )
     mIcon->setPixmap( KMimeType::mimeType( mimeType )->pixmap( TDEIcon::Desktop ) );
   else
-    mIcon->setPixmap( DesktopIcon("text-x-katefilelist") );
+    mIcon->setPixmap( DesktopIcon("unknown") );
 }