Disable fit add on pages based on context (ship vs citadel)

gui/implantView.py

@@ -107,6 +107,11 @@ class ImplantDisplay(d.Display):
         event.Skip()
 
     def fitChanged(self, event):
+        sFit = service.Fit.getInstance()
+        fit = sFit.getFit(event.fitID)
+
+        self.Parent.Parent.Parent.DisablePage(self.Parent, not fit or fit.isStructure)
+
         #Clear list and get out if current fitId is None
         if event.fitID is None and self.lastFitId is not None:
             self.DeleteAllItems()
@@ -114,9 +119,6 @@ class ImplantDisplay(d.Display):
             event.Skip()
             return
 
-        sFit = service.Fit.getInstance()
-        fit = sFit.getFit(event.fitID)
-
         self.original = fit.implants if fit is not None else None
         self.implants = stuff = fit.appliedImplants if fit is not None else None
         if stuff is not None: stuff.sort(key=lambda implant: implant.slot)