FIX Don't strip `<header>` tag from `HTMLValue` (#11302)

FIX DBForeignKey scaffolding missing parameter (#11295)

Co-authored-by: johannes.hammersen <[email protected]>

Merge pull request #11287 from johannesx75/fix-remove-write-from-Sear…

…chableDropdownTrait

FIX remove write from SearchableDropdownTrait

Merge pull request #11270 from creative-commoners/pulls/5.2/remove-self

ENH Use class name instead of self

FIX Don't load data up front for lazy-loaded searchable dropdown (#11278

)

improve DataList and ArrayList docblock comments for PHPStorm (#11263)

addresses #11247

FIX HTMLEditorField is not able to show html or xml code examples (#1…

…1243)

FIX 'which' check in 'sake' now works for aliases (#11232)

FIX many_many through should allow subclasses (#11230)

```php
class HomePage extends Page
{
    private static $many_many = [
        'HeroImages' => [
            'through' => PageImageLink::class,
            'from' => 'Page',
            'to' => 'Image',
        ]
    ];

}
```

```php
class PageImageLink extends DataObject
{
    private static $has_one = [
        'Page' => SiteTree::class,
        'Image' => Image::class,
    ];
}

This fails because the linking object's relation class doesn't exactly match the owner. Sharing the linking objects across various entries in the ancestry should be a supported use case.

Co-authored-by: Aaron Carlino <[email protected]>

FIX Correctly eagerload polymorphic has_one relations (#11204)