Fix visualisation for extended partitions with single child (vtrefny)
    
    - Fix parent visualization for encrypted LVMs (vtrefny)
    - Allow adding new VG to an empty LVMPV (vtrefny)
    - Remove obsolete definiton of locate_ui_file method (vtrefny)
    - Do not allow displaying device info for raw format devices (vtrefny)
    - Remove old visualization files (vtrefny)
    - Display context menu for logical view visualization (vtrefny)
    - New UI, part 4: Physical View -- parents visualization (vtrefny)
    - Fix visualization for raw format devices (vtrefny)
    - Tweak device visualisation in logical view using CSS (vtrefny)
    - Move various GUI helper functions into one file (vtrefny)
    - New UI, part 3: New device visualisation for logical view (vtrefny)
    - BlivetUtilsServer: quit when recieve empty message (vtrefny)
    - Renaming few files and folders (vtrefny)