The following are notable changes made in this commit
* Lesson page type are now class based and extend an abstract class. This includes a class for the page type and a class for the creating/editing a instance of this page.
* Converted all forms to mforms
* Action script located in mod/action/* were worked into the above so far less switch statements and the action directory will be removed.
* Implements a custom renderer
* Converted everything to use page, output, and custom renderer methods
* Replaced all deprecated methods incl. print_textarea conversions
* Tried to cut down on excessive DB calls.
Things worth noting:
* The focus of this patch was on cleaning up the module not rewriting it, as such I have organized NOT rewritten. There are still many areas in the module where the code could be greatly improved however to do so would require a rethink/rewrite
Passwords are now held in clear text so you can see what the password
is on the config screen.
Still backward compatible with old md5 passwords (which are still not displayed
of course)
Merged from STABLE_19
* added pagelib.php with lesson_page class definition
* Lesson view now uses standard page layout classes
Other fixes:
* minor fix to mod settings form
* fixed function names (some were missing lesson_ prefix)
also used new cancel button in all mod_forms as well as a 'Revert' button and reworked logic about where to go on cancel or after submission for modedit.php
