eeschema: remember last browsed directory in the Symbol Lib Table dialog

eeschema/dialogs/dialog_sym_lib_table.cpp

@@ -353,9 +353,15 @@ void DIALOG_SYMBOL_LIB_TABLE::browseLibrariesHandler( wxCommandEvent& event )
             wxEmptyString, SchematicLibraryFileWildcard(),
             wxFD_OPEN | wxFD_FILE_MUST_EXIST | wxFD_MULTIPLE );
 
-    if( dlg.ShowModal() == wxID_CANCEL )
+    dlg.SetDirectory( m_lastBrowseDir );
+
+    auto result = dlg.ShowModal();
+
+    if( result == wxID_CANCEL )
         return;
 
+    m_lastBrowseDir = dlg.GetDirectory();
+
     wxArrayString files;
     dlg.GetFilenames( files );
 

eeschema/dialogs/dialog_sym_lib_table.h

@@ -88,6 +88,8 @@ private:
 
     wxGrid*          m_cur_grid;     ///< changed based on tab choice
     static int       m_pageNdx;      ///< Remember the last notebook page selected during a session
+
+    wxString         m_lastBrowseDir; ///< last browsed directory
 };
 
 #endif    // _DIALOG_SYM_LIB_TABLE_H_