Currently if users have calendars with long names, they can be cut off in Task Properties> General> general> calendar picker.
This discourages users from using Pro as a plannning/ scheduling tool.
Provide a way to see full calendar names, or give user the option to resize the general pane to display full calendar names.
You can slide the divider between the field names ("Calendar") and the values to make more space in the drop-down.
If that still does not provide enough space, you can change the Task Properties panel to a vertical orientation (longer than wide) and then make the whole window wider