If you try pressing CTRL A to select all tasks, it becomes challenging to deselect them. The expected behavior would be that left clicking should deselect all other tasks in the chart.
I have tried using the "ToggleEdit" flag, but that also doesn't give me the expected behavior either, since if you press CTRL A, then try double-clicking on a task, it keeps moving the selection between the task you click on and another task that was previously selected within the Gantt Chart.
If there is a way to make the "ToggleEdit" functionality check for a left click, and if the left click occurs, then all of the other tasks in the Gantt Chart are deselected, that should fix the problem I am running into.