Fix shortcut override confirmation text

- Shortcut cancellation confirmation text should display the latest override, not the first override
- Addresses a text display bug identified by Mike here: nightscout#177 (comment)

FreeAPS/Sources/Shortcuts/Override/OverridePresetsIntentRequest.swift

@@ -87,7 +87,7 @@ import Foundation
         try? coredataContext.perform { [self] in
             let requestOverrides = Override.fetchRequest() as NSFetchRequest<Override>
             requestOverrides.predicate = NSPredicate(format: "enabled == %@", NSNumber(value: true))
-            if let activeOverride = try? self.coredataContext.fetch(requestOverrides).first {
+            if let activeOverride = try? self.coredataContext.fetch(requestOverrides).last {
                 if let activeOverrideId = activeOverride.id, let fetchedOverride = fetchOne(activeOverrideId) {
                     cancelledOverrideName = fetchedOverride.name
                 }