MDL-47353 gradereport_grader: Only respect fixed headers

Even if the navbar is in a static header, it should only be respected if it
is fixed still.

This issue is a part of the MDL-46658 Task.
This issue is a part of the MDL-25544 Epic.
MDL-46658 gradereport_grader: Style the ajax editing error

This issue is a part of the MDL-25544 Epic.
MDL-46658 gradereport_grader: Fix minor RTL style issues

This issue is a part of the MDL-25544 Epic.
MDL-46658 gradereport_grader: Remove max-width for RTL

For some reason, Safari behaves incorrectly when dealing with RTL content
where the table has a max-width of 100%.

This issue is a part of the MDL-25544 Epic.
MDL-40351 course overview block: improved strings
MDL-46576 core_grades: Fix upgrade to natural weight.

When upgrading from 'Sum of grades' to natural aggregation the
weights were no automatically assigned and the grade totals were
wrong. This has now been rectified.
MDL-43089 quiz editing: don't pop up qbank on initial page load.
Automatically generated installer lang files
Automatically generated installer lang files
NOBUG: Fixed SVG browser compatibility
NOBUG: Fixed file access permissions
Moodle release 2.8beta

jabber bot fighting edition.
MDL-47006 core_grades: Add weight settings to outcome edit page

Part of MDL-46576.
MDL-47243: Add data generators for scales and outcomes

Part of MDL-46576.
MDL-47243 Allow extra credit on outcome grade items
MDL-47243: Add behat tests for outcomes in Natural aggregation

Part of MDL-46576