[FEATURE] limit the button text count on message box

[bytemain]

如果你的需求与问题相关，请在下面描述一下（Is your feature request related to a problem? Please describe.）

if a extension showInfo with a long button text, it's looks like a bit strange.

描述你预期的功能表现（Describe the solution you'd like）

描述你考虑过的替代方案（Describe alternatives you've considered）

补充信息（Additional context）

[erha19]

@bytemain 看能不能补充一些信息

[bytemain]

右下角那个提示，两个按钮水平方向不一样高

[bytemain]

Closed By: https://github.com/opensumi/core/pull/1599