fix(toolbox): toolbox doesn't enter emphasis state when hovering on the icon.

[plainheart]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Fix toolbox doesn't enter emphasis state when hovering on the icon.

Fixed issues

• [BUG] toolbox doesn't enter emphasis state when hovering on the icon. #13777

Details

Please refer to #13777 for details.

Misc

• The API has been changed (apache/echarts-doc#xxx).
• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

Any test cases that enable the toolbox.

Others

Merging options

• Please squash the commits into a single one when merging.

Other information

[echarts-bot]

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[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍