Fixed an issue where entering a duration of less than 1 day for tasks with Scheduling Mode = Fixed Effort was not possible.

When users entered a value below 1 (for example, 0.5) in the Duration field, the task was incorrectly converted into a milestone and the duration was automatically set to 0 days.

With this fix, users can now correctly enter duration values smaller than 1 day without the task being converted to a milestone.