MDL-23514 lang : Adding an option to force language of documentation links
MDL-42618 fix grade importing of whitespace idnumbers
MDL-44018 quesiton variant was not backed up or restored.
MDL-40061 mod_data: replaced 'view' add_to_log call with an event
MDL-40061 mod_data: replaced 'view all' add_to_log call with an event
MDL-43979 Javascript: Correct checking of attributes during dialogue init

Various dialogue attributes are optional and are provided by the parent and
not provided as attributes to the dialogue being initted.

As a result, if the setting is not provided during init, we were assuming
that the value would be false rather than checking the real attribute.
MDL-44055 mod_quiz: Add missing alternate name fields
MDL-44055 mod_glossary: Add missing alternate name fields
MDL-44079 Javascript: Check whether a dialogue is focused before closing
MDL-44079 Javascript: Closing a tooltip should pass event details
MDL-44079 Javascript: EditPDF editor should be modal
MDL-44042 Javascript: Handle moving to the top of the current section with keyboard
MDL-44142 Cohorts: Use maxusersperpage for list of current users.
MDL-44161 Javascript: Include upstream patch for modal widget position jump

This is courtesty of the upstream pull request https://github.com/yui/yui3/pull/1636
MDL-41755 tablelib : added a function to add multiple rows at once
MDL-41758 quiz statistics : link to full break down of stats for slots

where a question in a slot has subquestions and/or variants.
MDL-41759 quiz statistics : break down responses for each variant
MDL-43539 quiz statistics : coding error from progress bar

when no sub-questions - "parent progress count must be at least 1"
MDL-43479 quiz response analysis : suppress break down by variants

where there are very many variants
MDL-27414 Upgrade the randomsamatch qtype to the new question engine
Added XML import/export
Different randomsamatch qtypes in the same quiz can now pick the same
shortanswer question.
Images are not preserved if shortanswer question is deleted after being
used in a randomsamatch attempt.