Icons: use correct size for open action in toolbar

Previously 16x16 was used

common/tool/actions.cpp

@@ -57,7 +57,7 @@ TOOL_ACTION ACTIONS::open( "common.Control.open",
         AS_GLOBAL,
         MD_CTRL + 'O', LEGACY_HK_NAME( "Open" ),
         _( "Open..." ), _( "Open existing document" ),
-        folder_xpm );
+        directory_open_xpm );
 
 TOOL_ACTION ACTIONS::save( "common.Control.save",
         AS_GLOBAL,

pcbnew/menubar_pcb_editor.cpp

@@ -412,12 +412,12 @@ void PCB_EDIT_FRAME::ReCreateMenuBar()
     submenuActionPlugins->Add( _( "Reveal Plugin Folder in Finder" ),
                                _( "Reveals the plugins folder in a Finder window" ),
                                ID_TOOLBARH_PCB_ACTION_PLUGIN_SHOW_FOLDER,
-                               folder_xpm );
+                               directory_open_xmp );
 #else
     submenuActionPlugins->Add( _( "Open Plugin Directory" ),
                                _( "Opens the directory in the default system file manager" ),
                                ID_TOOLBARH_PCB_ACTION_PLUGIN_SHOW_FOLDER,
-                               folder_xpm );
+                               directory_open_xmp );
 #endif
     // Populate the Action Plugin sub-menu: Must be done before Add
     // Since the object is cloned by Add