Add section indicating datainput uses to DI management dialog

IN datainput management dialog, add a section underneath the list of datainputs (make list scrollable in case the number of DIs is large). 

In this section, show the currently selected datainput bindings by listing the object names that are using datainput as controller. Name list only shows the object name, but tooltip should show the element path of the object.

In the list of datainputs, show the number of controlled elements in brackets () after the datainput name.