fix search, do not reset it at opening an item

app/src/main/kotlin/com/simplemobiletools/filemanager/pro/activities/MainActivity.kt

@@ -70,16 +70,6 @@ class MainActivity : SimpleActivity() {
         }
     }
 
-    override fun onResume() {
-        super.onResume()
-        invalidateOptionsMenu()
-    }
-
-    override fun onStop() {
-        super.onStop()
-        searchMenuItem?.collapseActionView()
-    }
-
     override fun onDestroy() {
         super.onDestroy()
         config.temporarilyShowHidden = false