Don't call OnPageSettingsChanges on Undo/Redo.

It's incredibly expensive (multiple seconds on a document with
lots of text in an outline font).

(cherry picked from commit 81d7428fd2)

eeschema/tools/sch_editor_control.cpp

@@ -1250,7 +1250,6 @@ int SCH_EDITOR_CONTROL::Redo( const TOOL_EVENT& aEvent )
 
     m_frame->SetSheetNumberAndCount();
     m_frame->TestDanglingEnds();
-    m_frame->OnPageSettingsChange();
 
     m_toolMgr->GetTool<EE_SELECTION_TOOL>()->RebuildSelection();