(ui): add full path configuration for file video

Description

Add an option in the Scamera to use full path. Make it false by default

When loading a file for camera, the full or relative path is set depending on the option value.

Closes #758 (closed)

How to test it?

Run an application which displays a video.

Run it once with the "useFullPath" at true, and once with it at false.

The application should work fine with both.