Lxqt Configuration of Meilix

[meets2tarun]

Short description

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  Configuration needed in the LXQt version #88
  This PR will take care of all the checkpoints mention below:
• Switch off notification
• Switch off screensaver and sleep modes
• Switch off system sounds
• Pre-set start system without password
• Update to latest version (without password)
• Switch off screen dimming
• switch off power management saving features
• link to the slide folder from the desktop (edit "make a link")
• autohide panel

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