Check if bottom sheet is cancellable.

vector/src/main/java/im/vector/app/features/crypto/verification/VerificationBottomSheet.kt

@@ -85,10 +85,6 @@ class VerificationBottomSheet : VectorBaseBottomSheetDialogFragment<BottomSheetV
         return BottomSheetVerificationBinding.inflate(inflater, container, false)
     }
 
-    init {
-        isCancelable = true
-    }
-
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
@@ -211,6 +207,8 @@ class VerificationBottomSheet : VectorBaseBottomSheetDialogFragment<BottomSheetV
             return@withState
         }
 
+        isCancelable = state.isVerificationRequired.not()
+
         // Did the request result in a SAS transaction?
         if (state.sasTransactionState != null) {
             when (state.sasTransactionState) {