allow control-click to present the contextual menu for SizeWell zoom options
Where standard zoom behaviour is preferred and right-click is possible:
• right-click presents the contextual menu.
Where standard zoom behaviour is preferred and right-click is **not** possible — or for users who prefer/require the traditional control-click for contextual menus — the conflicting setting can be deselected in the zooming tab of the SizeWell preference pane. However:
• control-click does not present the contextual menu.
Allowing control-click to be equivalent to right-click will add polish to the software.
(Maybe something in Apple HIG re: control-click, I haven't checked recently.)