Prevent the slot filters from filtering items that fit into no slots (like drones)

gui/builtinMarketBrowser/itemView.py

@@ -206,7 +206,7 @@ class ItemView(Display):
         activeSlotFilters = []
         fitsFilterActive = False
         for btn in self.marketBrowser.slotButtons:
-            if btn.userSelected:
+            if btn.userSelected and btn.IsEnabled():
                 if btn.filterType == "fits":
                     fitsFilterActive = True
                 elif btn.filterType == "slot":
@@ -325,13 +325,16 @@ class ItemView(Display):
             if btn.filterType == "fits":
                 # Fits button is available if there's an active fit
                 fitId = self.mainFrame.getActiveFit()
-                btn.setMetaAvailable(fitId is not None)
+                isAvailable = fitId is not None
+                btn.setMetaAvailable(isAvailable)
+                if not isAvailable:
+                    btn.setUserSelection(False)
             elif btn.filterType == "slot":
                 # Slot button is available if items with that slot exist in current view
-                if btn.slotType in slotIDs:
-                    btn.setMetaAvailable(True)
-                else:
-                    btn.setMetaAvailable(False)
+                isAvailable = btn.slotType in slotIDs
+                btn.setMetaAvailable(isAvailable)
+                if not isAvailable:
+                    btn.setUserSelection(False)
 
     def scheduleSearch(self, event=None):
         self.searchTimer.Stop()  # Cancel any pending timers