TODO
  * several vobs pro title
  * titleset props - aspect ratio control (automatic 4:3, 16:9 & 4:3 pan & scan)
  * slideshow
  * show safe-tv area
  * show new dialog by first start
  * fix generation under win98
  * fix saving of filenames with stressed letters in dvdauthor.xml
  * button properties: replace direction "auto" with "auto (buttonX)"
  * button properties: add x,y; fixed/auto width,height
  * menu object: to top, to bottom 
  * menu properties: background stretch option, alignment
  * colour dialog: store custom colours
  * buttons: default fonts and colours
  * text: background color & alpha channel value
  * titles: show size
  * statusbar: show totalsize
  * context menu: play/add movie, assign as background
  * progress dialog: add detailsGauge -> parsing of details data
  * progress dialog: button to show/hide details, minimize
  * progress dialog: save log
  * don't use dnd if it not avaible (for wxUniv package)
  * rememebering last directorys or possibility to set these
  * dvd menu: setting (default) bitrate => option -b in Jpeg2Mpeg command
  * video-thumnails
  * various buttons
  * add music to menu
  * select the language for different audio streams
  * ability to mux text based subtitles to videos
  * support of .wav, .avi, .vdr
  * fix scale of text-object
  * fix reducing of colours in menu (Menu::GetImage())
  * use external library to draw menu (to make independent of screen colour depth)

