AssetManager 0.3.7.7

- Login page translated via i18n keys.
- Language switching remains available before login and is stored only in the session until authentication.
- Translation management can add custom translation keys directly.
- Custom translations can be selected with checkboxes and deleted in bulk.
- Built-in translation keys are protected from deletion because they are required by the application.
- Translation filter layout corrected.
- Table headings in all included table templates use translation keys, including dynamic asset fields.
- Mesh debug requires re-entry of the current user's password.
- Local users are verified against the local password hash; LDAP users are verified against LDAP.
- Mesh debug password is sent only in the POST request and is not stored.