update input field docs

fixes #1081

Author: lovasoa

examples/official-site/sqlpage/migrations/01_documentation.sql

@@ -276,7 +276,7 @@ INSERT INTO parameter(component, name, description, type, top_level, optional) S
     ('id', 'A unique identifier for the form, which can then be used to validate the form from a button outside of the form.', 'TEXT', TRUE, TRUE),
     ('auto_submit', 'Automatically submit the form when the user changes any of its fields, and remove the validation button.', 'BOOLEAN', TRUE, TRUE),
     -- item level
-    ('type', 'The type of input to use: text for a simple text field, textarea for a multi-line text input control, number to accept only numbers, checkbox, switch, or radio for a button that is part of a group specified in the ''name'' parameter, header for a form header, hidden for a value that will be submitted but not shown to the user. text by default.', 'TEXT', FALSE, TRUE),
+    ('type', 'Declares input control behavior and expected format. All HTML input types are supported (text, number, date, file, checkbox, radio, hidden, ...). SQLPage adds some custom types: textarea, switch, header. text by default. See https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/input#input_types', 'TEXT', FALSE, TRUE),
     ('name', 'The name of the input field, that you can use in the target page to get the value the user entered for the field.', 'TEXT', FALSE, FALSE),
     ('label', 'A friendly name for the text field to show to the user.', 'TEXT', FALSE, TRUE),
     ('placeholder', 'A placeholder text that will be shown in the field when is is empty.', 'TEXT', FALSE, TRUE),