more fixes

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/views/call/CallView.android.kt

@@ -709,9 +709,11 @@ fun WebRTCView(callCommand: SnapshotStateList<WCallCommand>, onResponse: (WVAPIM
         .filterNotNull()
         .collect {
           while (callCommand.isNotEmpty()) {
-            val cmd = callCommand.removeFirst()
+            val cmd = callCommand.removeFirstOrNull()
             Log.d(TAG, "WebRTCView LaunchedEffect executing $cmd")
-            processCommand(wv, cmd)
+            if (cmd != null) {
+              processCommand(wv, cmd)
+            }
           }
         }
     }

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/DesktopApp.kt

@@ -173,7 +173,7 @@ private fun ApplicationScope.AppWindow(closedByError: MutableState<Boolean>) {
         // Shows toast in insertion order with preferred delay per toast. New one will be shown once previous one expires
         LaunchedEffect(toast, toasts.size) {
           delay(toast.second)
-          simplexWindowState.toasts.removeFirst()
+          simplexWindowState.toasts.removeFirstOrNull()
         }
       }
       var windowFocused by remember { simplexWindowState.windowFocused }

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/call/CallView.desktop.kt

@@ -195,9 +195,11 @@ fun WebRTCController(callCommand: SnapshotStateList<WCallCommand>, onResponse: (
           delay(100)
         }
         while (callCommand.isNotEmpty()) {
-          val cmd = callCommand.removeFirst()
+          val cmd = callCommand.removeFirstOrNull()
           Log.d(TAG, "WebRTCController LaunchedEffect executing $cmd")
-          processCommand(cmd)
+          if (cmd != null) {
+            processCommand(cmd)
+          }
         }
       }
   }