Check/display new or existing files/medias in page

[bonnebulle]

Hello everybody
Am working with the grav-plugin-admin web interface
but some time am using the "folder way" to edit / add contents
and so for images / medias !
For example I can drag-n-drop file directly into pages/test_page/image_1.jpg

But files I add ( in the folder/manual or admin way )
dont appears into the admin/edit page ! 😢

The filepicker show me them, cool
... but, it would be much more easier to show the new added files
directly after/in/under the media field ("media" in blueprint)

( like when I upload some )
( but for already existing ones )

My blueprint :

            media_files:
              type: file
              label: Médias
              multiple: true
              destination: 'self@'
              random_name: false
              avoid_overwriting: false
              limit: 10
              accept:
                - image/*

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Some links I follow ( much more about filepicker / pagemediaselect )

• Filepicker form field by flaviocopes · Pull Request Filepicker form field #750 · getgrav/grav-plugin-admin
  ↳ Filepicker form field #750
• Pagemediaselect should refresh when new media is uploaded · Issue Pagemediaselect should refresh when new media is uploaded #450 · getgrav/grav-plugin-admin
  ↳ Pagemediaselect should refresh when new media is uploaded #450
• Dynamic update pagemediaselect fields when pagemedia file is uploaded · Issue Dynamic update pagemediaselect fields when pagemedia file is uploaded #741 · getgrav/grav-plugin-admin
  ↳ Dynamic update pagemediaselect fields when pagemedia file is uploaded #741

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So my question is, for now :
How do the admin-plugin is "searching"/"scanning" for new media files ?
What it the task trigger ? Can I force this process to start ?

I follow this question :
task.addmedia
https://discourse.getgrav.org/t/issues-with-page-media-in-admin-task-addmedia/1311/6

Maybe using an other cron / routine task ?

Thanks