Merge branch 'viewModelDestroyDuration'

src/main/java/com/kdanmobile/reader/ReaderModel.kt

@@ -10,6 +10,7 @@ import com.kdanmobile.kmpdfkit.manager.controller.KMPDFDocumentController
 import java.util.*
 
 object ReaderModel {
+    private const val DURATION_WAIT_TO_DESTROY = 200L
     private const val TAG = "ReaderModel"
 
     private var filename: String? = null
@@ -86,7 +87,7 @@ object ReaderModel {
 
         if (set.isEmpty()) {
             shouldDestroy = true
-            handler.sendEmptyMessageDelayed(10, 2000)
+            handler.sendEmptyMessageDelayed(10, DURATION_WAIT_TO_DESTROY)
         }
         printSet()
     }