Issue #1261 show variations menu for cargo items

Added logic to condition statement in metaSwap.py to accomodate
cargoItem context. Will replace existing cargo item with selected
item and retain the original stack amount.

gui/builtinContextMenus/metaSwap.py

@@ -14,6 +14,7 @@ from eos.saveddata.module import Module
 from eos.saveddata.drone import Drone
 from eos.saveddata.fighter import Fighter
 from eos.saveddata.implant import Implant
+from eos.saveddata.cargo import Cargo
 
 
 class MetaSwap(ContextMenu):
@@ -31,6 +32,7 @@ class MetaSwap(ContextMenu):
                 "fighterItem",
                 "boosterItem",
                 "implantItem",
+                "cargoItem",
         ):
             return False
 
@@ -185,6 +187,13 @@ class MetaSwap(ContextMenu):
                         sFit.addImplant(fitID, item.ID, True)
                         break
 
+            elif isinstance(selected_item, Cargo):
+                for idx, cargo_stack in enumerate(fit.cargo):
+                    if cargo_stack is selected_item:
+                        sFit.removeCargo(fitID, idx)
+                        sFit.addCargo(fitID, item.ID, cargo_stack.amount, True)
+                        break
+
         wx.PostEvent(self.mainFrame, GE.FitChanged(fitID=fitID))