v1.10.0-pre6

• Added feedback reset logic when source not in use anymore (e.g. sends 'zero' feedback value if mapping removed)
• Improved behavior when using 'Learn source filter': Also indicate if a source has been touched that is not used in any mapping (by showing an empty mapping list)
• #208 Fixed non-working 'Track must be selected' target condition
• Fixed non-moving slider when slider currently focused