update documentation

Author: djyotta

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

@@ -750,6 +750,8 @@ INSERT INTO parameter(component, name, description, type, top_level, optional) S
     ('rss', 'The URL of an RSS feed to display in the top navigation bar. You can use the rss component to generate the field.', 'URL', TRUE, TRUE),
     ('image', 'The URL of an image to display next to the page title.', 'URL', TRUE, TRUE),
     ('icon', 'Name of an icon (from tabler-icons.io) to display next to the title in the navigation bar.', 'ICON', TRUE, TRUE),
+    ('favicon', 'The URL of the icon the web browser should display in bookmarks and tabs. The browser typically looks for this icon at your.domain/favicon.ico so this property is particularly useful for sites hosted behind a reverse proxy.', 'URL', TRUE, TRUE),
+    ('manifest', 'The location of the manifest.json if the site is a PWA. This enables your site to be ''installed'' as an app on most mobile devices', 'URL', TRUE, TRUE),
     ('menu_item', 'Adds a menu item in the navigation bar at the top of the page. The menu item will have the specified name, and will link to as .sql file of the same name. A dropdown can be generated by passing a json object with a `title` and `submenu` properties.', 'TEXT', TRUE, TRUE),
     ('search_target', 'When this is set, a search field will appear in the top navigation bar, and load the specified sql file with an URL parameter named "search" when the user searches something.', 'TEXT', TRUE, TRUE),
     ('norobot', 'Forbids robots to save this page in their database and follow the links on this page. This will prevent this page to appear in Google search results for any query, for instance.', 'BOOLEAN', TRUE, TRUE),