UI: Confirmation prompt for file path auto-create

This confirmation prompt was there earlier, we removed the prompts for
creating new directories all together, but in this case it's reasonable.
Without it, it's simply too easy to create new directories by accident.

source/blender/editors/space_file/file_ops.c

@@ -2059,6 +2059,7 @@ void FILE_OT_directory_new(struct wmOperatorType *ot)
   ot->idname = "FILE_OT_directory_new";
 
   /* api callbacks */
+  ot->invoke = WM_operator_confirm_or_exec;
   ot->exec = file_directory_new_exec;
   ot->poll = ED_operator_file_active; /* <- important, handler is on window level */
 
@@ -2067,6 +2068,7 @@ void FILE_OT_directory_new(struct wmOperatorType *ot)
   RNA_def_property_flag(prop, PROP_SKIP_SAVE);
   prop = RNA_def_boolean(ot->srna, "open", false, "Open", "Open new directory");
   RNA_def_property_flag(prop, PROP_SKIP_SAVE);
+  WM_operator_properties_confirm_or_exec(ot);
 }
 
 /* TODO This should go to BLI_path_utils. */
@@ -2198,6 +2200,8 @@ void file_directory_enter_handle(bContext *C, void *UNUSED(arg_unused), void *UN
         WM_operator_properties_create_ptr(&ptr, ot);
         RNA_string_set(&ptr, "directory", sfile->params->dir);
         RNA_boolean_set(&ptr, "open", true);
+        /* Enable confirmation prompt, else it's too easy to accidentaly create new directories. */
+        RNA_boolean_set(&ptr, "confirm", true);
 
         if (lastdir) {
           BLI_strncpy(sfile->params->dir, lastdir, sizeof(sfile->params->dir));