Localisation manager > Filter capability

[mfendeksilverstripe]

Description

Localisation manager tab lacks a filter component for its GridField. This is because prior to CMS 5 such capability was not supported. With CMS 5 available now we should aim to add this filtering capability.

Additional context or points of discussion

Code reference:

https://github.com/tractorcow-farm/silverstripe-fluent/blob/7/src/Extension/Traits/FluentObjectTrait.php#L110

Validations

• You intend to implement the feature yourself
• You have read the contributing guide
• You strongly believe this feature should be in core, rather than being its own community module
• You have checked for existing issues or pull requests related to this feature (and didn't find any)