Pcbnew: footprint viewer wxAUI improvements.

* Make the tool bar dockable.
* Enable the overflow control in the tool bar in case the it does not fit in
  it's parent window.
* Fix some wxAuiPaneInfo usage issues.
* Remove unused wxAuiPaneInfo objects.
* Move perspective saving and loading into EDA_BASE_FRAME object in preparation
  for extending this to all frame windows.

common/basicframe.cpp

@@ -56,6 +56,10 @@ const wxChar* traceAutoSave = wxT( "KicadAutoSave" );
 /// Configuration file entry name for auto save interval.
 static const wxChar* entryAutoSaveInterval = wxT( "AutoSaveInterval" );
 
+/// Configuration file entry for wxAuiManger perspective.
+static const wxChar* entryPerspective = wxT( "ModViewPerspective" );
+
+
 
 EDA_BASE_FRAME::EDA_BASE_FRAME( wxWindow* aParent,
                                 ID_DRAWFRAME_TYPE aFrameType,
@@ -213,6 +217,11 @@ void EDA_BASE_FRAME::LoadSettings()
 
     if( maximized )
         Maximize();
+
+    // Once this is fully implemented, wxAuiManager will be used to maintain the persistance of
+    // the main frame and all it's managed windows and all of the legacy frame persistence
+    // position code can be removed.
+    config->Read( m_FrameName + entryPerspective, &m_perspective );
 }
 
 
@@ -247,6 +256,11 @@ void EDA_BASE_FRAME::SaveSettings()
         text = m_FrameName + entryAutoSaveInterval;
         config->Write( text, m_autoSaveInterval );
     }
+
+    // Once this is fully implemented, wxAuiManager will be used to maintain the persistance of
+    // the main frame and all it's managed windows and all of the legacy frame persistence
+    // position code can be removed.
+    config->Write( m_FrameName + entryPerspective, m_auimgr.SavePerspective() );
 }