Update library trees when their items change.

Fixes https://gitlab.com/kicad/code/kicad/issues/4019

common/lib_tree_model_adapter.cpp

@@ -386,6 +386,21 @@ unsigned int LIB_TREE_MODEL_ADAPTER::GetChildren( wxDataViewItem const&   aItem,
 }
 
 
+void LIB_TREE_MODEL_ADAPTER::RefreshTree( LIB_TREE_NODE* aNode )
+{
+    if( !aNode )
+        aNode = &m_tree;
+
+    for( auto const& child: aNode->m_Children )
+    {
+        if( child->m_Score > 0 )
+            RefreshTree( child.get() );
+    }
+
+    ItemChanged( ToItem( aNode ) );
+}
+
+
 bool LIB_TREE_MODEL_ADAPTER::HasContainerColumns( wxDataViewItem const& aItem ) const
 {
     return IsContainer( aItem );

common/lib_tree_model_adapter.h

@@ -268,6 +268,8 @@ public:
     void Thaw() { m_freeze--; }
     bool IsFrozen() const { return m_freeze; }
 
+    void RefreshTree( LIB_TREE_NODE* aNode = nullptr );
+
     // Allows subclasses to nominate a context menu handler.
     virtual TOOL_INTERACTIVE* GetContextMenuTool() { return nullptr; }
 

common/widgets/lib_tree.cpp

@@ -216,14 +216,7 @@ void LIB_TREE::Regenerate( bool aKeepState )
 
 void LIB_TREE::RefreshLibTree()
 {
-#ifdef __WXOSX__
-    // Yes, this is an enormous hack.  It should be replaced if anyone can figure out a better
-    // way to get the OSX version to re-fetch the text and attributes from the dataModel for
-    // each visible item.
-    int width = m_tree_ctrl->GetColumn( 0 )->GetWidth();
-    m_tree_ctrl->GetColumn( 0 )->SetWidth( width + 1 );
-    m_tree_ctrl->GetColumn( 0 )->SetWidth( width );
-#endif
+    m_adapter->RefreshTree();
 }