Merge pull request #498 from KonstantinKolodnitsky/4.3

New loader cogs
Page title and meta tags
fix
trySet instead of trySetHTML for metas
fix
fix
appendHTML instead of trySetHTML
Periodic View reload functionality
Update atk4_univ_basic.js
Merge pull request #502 from DarkSide666/patch-11

Periodic View reload functionality
buggy class...
a more reasonable default layout
bump CSS to version 903
Footer is inserted into a wrapper.

If you don’t want wrapper, create your own layout or insert directly.
cleanup default admin a little.
app->dbConnect to return the DB object and not API.

It’s unlikely that the dbConnect is ever used for chaining. Also
ability to specify custom DSN could be useful for executing the method
several times, when multiple connections should be maintained.

Overall - dbConnect will have to be extended for lazy-loaded of
multiple database connections as it might be required by add-ons.
Added SQLite data controller on base of existing Data/SQL code
experimenting with standard-compliant header comments.
Formatting improvement.
fix redirect