Viena BETA version 0.610

Bug fixes
- Just some minor ones

New features
- Added Undo functions for the Modulators as well

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Viena BETA version 0.600

Bug fixes
- Fixed a number of bugs reported by Eurekalog
- Fixed the modulator editor
- The pitch shift Correction for audio samples as calculated by the frequency analyser got the direction wrong 
- The preset names could sometimes not be found 

New features
- Added Undo functions

User interface
- Made the virtual keyboard more visual
- Better consistency with Windows XP visual themes
- Removed superfluous functions from the audio Wave page (like the equalizer and the filter)