An error was showing up while deleting questions
(in the question_save_from_deletion method) which had been saved
and which belonged to a quiz with a super long name, not exceeding 255
characters, as the 'name' field in 'question_categories' table had a
max size of 255 characters. The shorten_text function was used to
shorten the string to 255 characters and a unit test was added with
the name test_question_save_from_deletion_quiz_with_long_name to test
the patch.
Passing parameters to implode() in reverse order is deprecated, use
implode($glue, $parts) instead of implode($parts, $glue).
This commit corresponds to phpunit and manual detections, core files.
Prevent having multiple top question categories when deleting a course category.
This commit also fix the problem of question files' contexts not being updated when moving them.
Changes include:
* question: Add bootstrap classes to buttons and selects so they look consistent.
* mod_quiz: Add bootstrap styles to report form elements
* question: Add bootstrap classes to question form elements
* And remove the success/fail styles from boost because they conflict badly
with the quiz plugin styles (making unreadable text).
* quiz: nav block buttons had black background
* quiz: Add bootstrap styles to quiz navigation buttons
* qtype_ddmarker: Remove bullets from list
Edit form coordinates preview had list bullets for each coordinate.
* boost: Prevent menu scrolling on quiz edit
* mod_quiz: Add bootstrap styles to edit quiz fields
Pagination and max grades forms.
* quiz: Undo some custom styles on review options
These checkboxes were laid out in a fake grid with no responsiveness
that conflicts with the bootstrap form-inline templates. Reset the
custom style to bootstrap default.
* quiz: Fix unit tests for boost changes
* qtype_ddwtos: Accurate positioning of drop targets
* questions: Make the review page responsive
* question: bootstrap 4 compatibility
.alert in bs4 contains no colours by default, you need to mix it with
one of the context classes to get some change in colours, borders etc.
