fix #416, do not show a notepicker on startup if we have only 1 note

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

@@ -1000,6 +1000,10 @@ class MainActivity : SimpleActivity() {
                     }
                 }
             }
+
+            if (it.size == 1 && config.showNotePicker) {
+                config.showNotePicker = false
+            }
         }
     }