Save windows locations in JSON application configuration

[Borewit]

Moves the window position and now added to %USERPROFILE%\.listFix()\options.json:

"applicationState" : {
    "playlistsOpened" : [ ],
    "framePositions" : {
      "mainFrame" : {
        "x" : 1007,
        "y" : 300,
        "width" : 600,
        "height" : 500
      }
    }
  }

The file %USERPROFILE%\.listFix()\position.ini is now longer used.

There is no automated way deleting this file.

The mainFrame position and size are saved to %USERPROFILE%\.listFix()\options.json on application exit or when other application settings are changed.

Resolves #54

[Borewit]

Build: listFix_2.6.0-PR112-5.exe