Updated text

app/src/main/res/values/strings.xml

@@ -336,7 +336,7 @@
     <string name="title_advanced_storage_space" translatable="false">Storage space: %1$s</string>
     <string name="title_advanced_last_cleanup" translatable="false">Last cleanup: %1$s</string>
 
-    <string name="title_advanced_hint">All options have sensible defaults and should be changed when there is necessary only</string>
+    <string name="title_advanced_hint">All settings have sensible default values, which should only be changed if necessary</string>
 
     <string name="title_advanced_enabled_hint">Globally disable or enable receiving of messages</string>
     <string name="title_advanced_manual_hint">If synchronization is disabled, it is still possible to synchronize manually by pulling down the message list. This will synchronize messages and execute operations for a limited time.</string>