Comment 8 for bug 1416890

Here's the patch for this improvment.

What is covered:
* Appel THEME->get_url() becomes THEME->get_image_url()
* Dans les templates, theme_url becomes theme_image_url

What is not covered :

* Create method call get_image_url in javascript
* Allow to use SVG in thumbnails (thumbs.php Files)
* Create a method to relative links (used $ smarty-> assign ('maharalogofilename', 'images / Site-logo-small .png')).
* Fix for atom.php files and viewlayout.php to get_config size ('wwwroot'). 'Theme / raw / static / images / logo.png Site';
* Manage License images svg (license.php)
* Manage themepaths () function in lib / web.php

Also, I have not implemented cache because it seemed too expensive.
A general cache solution like memcached seems a better solution.
However, this should not add significant load because the use of the svg file is disabled bu default.
Only theme using will check for this format.

To test, make sure all the lines of code have been replaced.
Otherwise, run the following load test:
phpunit ThemeTest htdocs/lib/tests/phpunit/ThemeTest.php

Finnally, the documentation may be updated once this task is accepted.

To be peer-reviewed.