not compatible with sitemap, make the plugin working on a level base

[Chrischii]

Hi,

the first thing, Ive recognized is, that the plugin is not compatible with the sitemap plugin (https://github.com/mcbSolutions/Pico-Plugins/tree/master/mcb_HtmlSitemap). There are pages not shown when Pico-Placing is activ.

The second thing is, that I want to suggest the plugin to work on a level basis not over all levels as it is now. That means the following setting

index.md (Home) Placing: 1
impress.md Placing: 3
verzeichnis/index.md Placing: 4
verzeichnis/test.md
anderes/index.md Placing: 2
anderes/anprobe.md Placing: 2
anderes/probe.md Placing: 3
anderes/wechsel.md Placing: 1

should lead to the following navigation / menu:

• Home
• Anderes
  -- Wechsel
  -- Anprobe
  -- Probe
• Impress
• Verzeichnis
  -- Test

Who can make this possible?

Regards,
Christian