remove PathDetails*, and use marshmallow schemas with methods to get icon_url, and "path" renamed to "root_dir", updated move* code to use new data structure

internal/js/files_support.js

@@ -119,12 +119,12 @@ function MoveDBox(path_details, db_url)
         <form id="mv_fm" class="form form-control-inline col-12">
         <input id="move_path_type" name="move_path_type" type="hidden"
         `
-    div += ' value="' + path_details[0].type + '"></input>'
+    div += ' value="' + path_details[0].type.name + '"></input>'
     div+=GetSelnAsDiv()
     yr=$('.highlight').first().attr('yr')
     dt=$('.highlight').first().attr('date')
     div+='<div class="row">Use Existing Directory (in the chosen path):</div><div id="existing"></div>'
-    GetExistingDirsAsDiv( dt, "existing", path_details[0].type )
+    GetExistingDirsAsDiv( dt, "existing", path_details[0].type.name )
     div+=`
         <div class="input-group my-3">
         <alert class="alert alert-primary my-auto py-1">
@@ -133,7 +133,7 @@ function MoveDBox(path_details, db_url)
     div+= '<svg id="move_path_icon" width="20" height="20" fill="currentColor"><use xlink:href="' + path_details[0].icon_url + '"></svg>'
     div+= '<select id="rp_sel" name="rel_path" class="text-primary alert-primary py-1 border border-primary rounded" onChange="change_rp_sel()">'
     for(p of path_details) {
-        div+= '<option path_type="'+p.type+'" icon_url="'+p.icon_url+'">'+p.path+'</option>'
+        div+= '<option path_type="'+p.type.name+'" icon_url="'+p.icon_url+'">'+p.root_dir+'</option>'
     }
     div+= '</select>'
     div+=`