New appearance settings
I am using Task Coach mainly as a simple to-do list for a project, since it can visualize/sort independently the different categories, tasks, and descriptions so easily and clearly.
In the version I am using on Ubuntu 20.04, I noticed that the Appearance settings of a task (either colors or icon) overwrite the Appearance settings of the category.
I would find it even more useful if the visualizations (including the icons) of categories and tasks would be independent of each other.
(But it is still possible however to set independently e.g. color background for the category and color foreground color for the task, choosing the icon for one of the two.)
An alternative solution inspired by other application is a personalized list of colored tags that can be attached to a task and visualized in a respective column.