perf(view): avoid running is_hidden_file when show_hidden is set (#471)

Author: mehalter

lua/oil/view.lua

@@ -22,7 +22,7 @@ local last_cursor_entry = {}
 ---@return boolean
 M.should_display = function(name, bufnr)
   return not config.view_options.is_always_hidden(name, bufnr)
-    and (not config.view_options.is_hidden_file(name, bufnr) or config.view_options.show_hidden)
+    and (config.view_options.show_hidden or not config.view_options.is_hidden_file(name, bufnr))
 end
 
 ---@param bufname string