Author: Huong Nguyen
MDL-73457 Course: Fix drag & drop image prevents moving resources
Including in this commit:
- Modify the UI to make the section dropzone more visible
- Prevent the direct image dragging in Chrome, Safari by improving the check
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0d4069918e28b3e325a0d9438e879dc17001778e
http://github.com/moodle/moodle/commit/0d4069918e28b3e325a0d9438e879dc17001778e
+ 4.0 en [addfilehere,core]