Release of v0.1.5

What's Changed

• Improve normalization defaults (e.g. selecting normalization task will auto-select it in other tasks)
• Improve data validation
• Fixed a bug where it was not possible to clear selected tasks
• Improved the way normalizations are validated
• Improved the way centroids are validated
• Fixed a bug where would be saved to the wrong place
• The average heatmap will now also produce average mass spectrum (which can automatically complete the average mass spectrum task)