tdf#91882 - make this hideous busy-loop lower priority and less busy.

This way the rendering code can get a look in.

Change-Id: Id100031ffe1c4b415ed4ef1272a0772ec99ab4a9

sc/source/ui/dbgui/sfiltdlg.cxx

@@ -87,7 +87,8 @@ ScSpecialFilterDlg::ScSpecialFilterDlg( SfxBindings* pB, SfxChildWindow* pCW, vc
 
     // Hack: RefInput-Kontrolle
     pIdle = new Idle;
-    pIdle->SetPriority( SchedulerPriority::MEDIUM ); // 50ms warten
+    // FIXME: this is an abomination
+    pIdle->SetPriority( SchedulerPriority::LOWEST );
     pIdle->SetIdleHdl( LINK( this, ScSpecialFilterDlg, TimeOutHdl ) );
     pIdle->Start();