- New tree view query on project class:

- 'Show unmatched connector pin pairs' : will show the first connection pin of each unmatched pair for which renumbering process will force match.  (Umatching pins that would not be forced to match will not be listed.)

- When renumbering process will be triggered, SkyCAD will consult the query and if it has 1 or more connector pins returned, it will display a warning to users, allowing user to navigate to unmatching connector pin pairs.  (Which will cancel renumbering.)

- The warning will allow the user to sepcify if they want to cancel unmatched pin forcing while still going through with renumbering.  (In which cas the warning message will be displayed again on next renumbering.)

- If any of the paired pin belongs to a connector having it 'allow unmatching pins' property checked will not be forced to match (and connector pin pair will not be considered unmatched pair.)