Added `beforeCopy`, `afterCopy`, `forceCopy` properties to AssetManager

fixes #4209

added common tier config

Fixes PHPDoc

docs/guide/concept-components.md typo and docs/guide-zh-CN/* adjusted.

Guide-zh-CN/concept-components.md proofread.Adjust line breaking; modified some words may cause confusing or distracting such as '屌，屌爆了，俩货，高大上，呀呀，妥妥的'.

在线编辑,同步分支

Guide-zh-cn/start-workflow Adjust a few words in order to follow the style of previous sections translation.

Upgrade jquery.inputmask to v3.0.52

Guide-zh-CN/concept-configurations.md translated.

IdentityInterface::findIdentity should return active users

```
interface IdentityInterface
{
    /**
     * Finds an identity by the given ID.
     * @param string|integer $id the ID to be looked for
     * @return IdentityInterface the identity object that matches the given ID.
     * Null should be returned if such an identity cannot be found
     * or the identity is not in an active state (disabled, deleted, etc.)
     */
    public static function findIdentity($id);
```

Removing unnecessary methods

proofread.