update index alert message

Author: dev-diaries41

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

@@ -31,7 +31,7 @@
 
     <!-- Search screen -->
     <string name="first_indexing">
-      Start first %1$s index to enable search, this may take a few minutes. Searching will be limited until the process is complete.
+      Start first %1$s index to enable search, this may take a few minutes. Searching will be limited until the process is complete. You can start it manually at anytime in settings.
     </string>
 
     <string name="storage_permissions">Storage permission required to search images.</string>