Fix crash when selection changes to nil in custom alert

Closes #517

Tusker/Screens/Utilities/CustomAlertController.swift

@@ -320,12 +320,12 @@ class CustomAlertActionsView: UIControl {
                     actionButtons[currentSelectedActionIndex].backgroundColor = nil
                 }
                 #if !os(visionOS)
-                if #available(iOS 17.5, *) {
-                    let view = selectedButton!.element
-                    let location = convert(CGPoint(x: view.bounds.midX, y: view.bounds.midY), from: view)
-                    generator.selectionChanged(at: location)
-                } else {
-                    generator.selectionChanged()
+                if selectedButton != nil {
+                    if #available(iOS 17.5, *) {
+                        generator.selectionChanged(at: recognizer.location(in: generator.view))
+                    } else {
+                        generator.selectionChanged()
+                    }
                 }
                 #endif