Limit to filesystem access

[Novan123]

The capture attribute can restrict, that directly the

• camera
• videorecorder
• audiorecorder
  should be shown as source for capturing.

We see no option to set the "filesystem" as direct source. Currently we must leave this attribute unset and the user can choose the source. But then he can also choose camera that we won't want as a source.

There should be an capture attribute value for filesystem...