[native filter] Enlarged default value window overlap with Multiple selection option.

[jinghua-qa]

Description

When select 3+ default value, the default value window will be enlarge and overlap with Multiple selection option.

Screenshot

environment: superset master

Design input

[jinghua-qa]

also clicking 'X' on the second line of the default value has no reponse

Screen.Recording.2021-06-23.at.12.11.59.AM.mov