fix #971, keep items as Favorites at move

app/src/main/kotlin/com/simplemobiletools/gallery/activities/ViewPagerActivity.kt

@@ -527,6 +527,7 @@ class ViewPagerActivity : SimpleActivity(), ViewPager.OnPageChangeListener, View
             config.tempFolderPath = ""
             if (!isCopyOperation) {
                 refreshViewPager()
+                updateFavoritePaths(fileDirItems, it)
             }
         }
     }

app/src/main/kotlin/com/simplemobiletools/gallery/adapters/MediaAdapter.kt

@@ -283,6 +283,7 @@ class MediaAdapter(activity: BaseSimpleActivity, var media: MutableList<Thumbnai
             activity.applicationContext.rescanFolderMedia(fileDirItems.first().getParentPath())
             if (!isCopyOperation) {
                 listener?.refreshItems()
+                activity.updateFavoritePaths(fileDirItems, it)
             }
         }
     }

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/Activity.kt

@@ -278,3 +278,12 @@ fun BaseSimpleActivity.showRecycleBinEmptyingDialog(callback: () -> Unit) {
         callback()
     }
 }
+
+fun BaseSimpleActivity.updateFavoritePaths(fileDirItems: ArrayList<FileDirItem>, destination: String) {
+    Thread {
+        fileDirItems.forEach {
+            val newPath = "$destination/${it.name}"
+            updateDBMediaPath(it.path, newPath)
+        }
+    }.start()
+}