Also change filepicker to use scaled svgs instead of sets of custom pngs. The svgs are taken from font-awesome.

Add field 'visibleoncoursepage' to the course_modules table
Add site-wide setting for turning on stealth mode availability
Add callback for "stealth" mode support in the course formats
Change display of modules/sections availability on the course page

* Fixed typo with context_module::instance
* Fixed use of $mod->get_context()

Thanks to Paulo Matos for the forum part of this change.

Also add the field cacherev to the lists of default fields in course retrieval functions

* Fixed IE8 display of icons.
* Fixed blocks using course renderer.
* Fixed behat tests.
* codecheckers fixes
* Removed alt from icons with descriptive text
* Tweaked actionmenu initialisation for performance

- get_print_section_cm_text()
- print_section_add_menus()
- print_section()
- make_editing_buttons()

In case when groupmode is forced by the course we should take it from the
course and not overwrite cm_info::groupmode externally

MDL-37085 Substitute function print_section_add_menus() with core_course_renderer::course_section_add_cm_controls()

- added function get_module_types_names() returning the list of localised strings used for module names;
- added function cm_info::get_used_module_names();
- added magic properties cm_info:: and cm_info:: returning human readable module name;
- replaced usage of function get_all_mods() with get_fast_modinfo() and get_module_types_names();
- function print_section_add_menus() may now retrieve the modules names list itself;
- deprecated function get_all_mods()

This commit:
a) moves modinfo code into new library modinfolib.php
b) uses classes instead of stdClass objects, allowing a huge amount of documentation (and IDE completion)
c) adds hooks so that plugins other than forum can display messages like forum's 'unread', and plugins other than label can display html (apart from/as well as their view.php link) on the course view page
d) removes current hacks for forum and label (mainly in print_section but also across the code), replacing with new 'content' and similar variables [this is the reason for the changes in blocks, etc]
e) reduces size of modinfo in database (only when rebuilt) by excluding empty fields

The change is intended to be backward compatible and does not affect the format of modinfo in database.

Major tasks undertaken in this patch:
* New format_text argument, overflowdiv.
* New page layout Report.
* Review of all format_text calls.
* Added support for the report layout to all themes.
* Changed forum post display from tables to divs.

AMOS START
 MOV [blockname,block_social_activities],[pluginname,block_social_activities]
AMOS END

MDL-20700 coding style cleanup - cvs keywords removed, closign php tag removed, trailing whitespace cleanup

and $CFG->modpixpath to $OUTPUT->mod_icon_url

MDL-12945 a slightly bigger patch for performance in recent activity and various group related issues + some other fixes - see list of subtasks in tracker; merged from MOODLE_19_STABLE