Blank/White area is shown in the Settings/Tasks pane in the right

[VineeshJain]

Blank/White area is shown on the right pane when a task gets deleted from the canvas

1. Open an existing workflow - notice that none of the tasks are highlighted. Settings pane on the right has the workflow scope and Tasks pane on the right shows the list of Tasks
2. Highlight an existing task in the workflow - Tasks pane has the highlighted task scope
3. delete the selected task - Notice that the Tasks pane goes away completely and blank white area is shown. Also there is no way to go back to the list of available tasks unless user clicks on the Canvas again or selects any other existing task in the workflow

We should keep the workflow scope to be default when no task is selected. After deleting the selected task in step 3, it will be good to show the Settings of the workflow or the List of tasks instead of white blank area. This will be consistent with step 1 in above when no task is selected and workflow settings are shown.