fix #1175, go back to search results at pressing Back

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

@@ -146,7 +146,10 @@ class MainActivity : SimpleActivity(), RefreshRecyclerViewListener {
         search_holder.background = ColorDrawable(config.backgroundColor)
         checkSwipeRefreshAvailability()
         checkShortcuts()
-        invalidateOptionsMenu()
+
+        if (!mIsSearchOpen) {
+            invalidateOptionsMenu()
+        }
     }
 
     override fun onPause() {
@@ -154,11 +157,6 @@ class MainActivity : SimpleActivity(), RefreshRecyclerViewListener {
         storeStateVariables()
     }
 
-    override fun onStop() {
-        super.onStop()
-        closeSearch()
-    }
-
     override fun onDestroy() {
         super.onDestroy()
         if (!isChangingConfigurations) {