Remove duplicate store of recent files
Remove duplicate store of recent files

There was a duplicate store of recent files in the menu, and it looks
like it may be related to #1721. The duplicate data serves no useful
purpose as it will never be shown in the application, and may be the
cause of issues such as that described.

OpenChemistry/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz