Please limit dragging QML Profiler event information

When dragging the event information around I've lost the information 'widget' completely (behind the QMLEditor) and I failed to get it back without restarting Creator.

Steps to reproduce:

• profile a qml project to get some data
• select an event (or enable the view information on mouseover) to bring up the information widget
• drag it behind the editor widget

It would be nice if the widget would be reset to the default position if

• a new profiling starts
• switching between Timeline and other tabs takes place
• changing the mouseover option

OR

• the dragging would be limited to the profiler widget