AssetManager 0.5.5.57

Fixed column resizing on management tables such as categories, translations, status values, fields, and dashboard/recent-job tables by routing all non-asset tables through the shared resize implementation.
Added permanently visible column separators and a larger resize hit area.
Unified asset and category image removal behavior. The preview now disappears immediately, a pending-removal message is shown, and the removal is applied on save.
Added a shared image editor script for consistent behavior across asset and category forms.