formEditor.sql: Add specific pattern message for Form.name allowed characters

extension/Source/sql/formEditor.sql

@@ -197,7 +197,8 @@ VALUES
 
   # Basic
   (1, 'name', 'Name', 'required', 'text', 'pattern', 'native', 110, 0, 0,
-   '<a href="{{documentation:Y}}#form-name">Info</a>', '', '', '', 'autofocus',
+   '<a href="{{documentation:Y}}#form-name">Info</a>', '', '', '',
+   'autofocus\ndata-pattern-error=Allowed characters: alphabet, number or . - +',
    1, '', '', '', 'specialchar', 'no', '[a-zA-Z0-9._+-]+'),
   (1, 'title', 'Title', 'show', 'text', 'all', 'native', 120, 0, 0, '<a href="{{documentation:Y}}#form-title">Info</a>',
    '', '', '', '', 1, '', '', '', 'none', 'no', ''),