3132456: Fix issue where views instances are emptied before an ajax request is complete

Closes #3132456

added 6320 commits

• 28c2da9c...c8fcd854 - 6310 earlier commits
• a888ab68 - Issue #3504745 by catch: Move cspell, build, and w3c legacy jobs around to...
• 4899db93 - Issue #3487014 by liam morland, nod_, smustgrave, quietone: Fix documentation...
• 616d1046 - Issue #3483411 by catch: Increase composer-stager constraint to the current stable release
• 71c58d67 - Issue #3202016 by mondrake, andypost, acbramley, mstrelan, hestenet, benmorss,...
• 75ea9ab7 - Issue #3202016 follow-up by alexpott: Let GDToolkit support AVIF image format
• 174c76f4 - Issue #289240 by oily, vomitHatSteve, smustgrave, darvanen, Ryan Palmer,...
• 31a1eb28 - Issue #293295 by smustgrave, jwilson3, acbramley, pameeela, lendude, nicxvan,...
• 9244acff - Issue #3502882 by catch, alexpott, godotislate: Add a classloader that can handle class moves
• 15fa2d85 - Issue #3509244 by berdir: Remove TestXSSTitleBlock, update block XSS tests
• 7f89a076 - Issue #3132456 by georgebrook: Views Ajax issue on deleting instances

Compare with previous version