查询导出改为后台进行，bootstrap-table数据超过几百页面就会卡住

[a516597993]

查询导出改为后台进行，bootstrap-table数据超过几百页面就会卡住，记录导出行为

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 4.90798% with 155 lines in your changes missing coverage. Please review.

Project coverage is 77.84%. Comparing base (4d9d3ba) to head (6618423).

Files with missing lines	Patch %	Lines
sql/query.py	2.36%	124 Missing :warning:
sql/utils/download_help.py	11.42%	31 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3016      +/-   ##
==========================================
- Coverage   78.51%   77.84%   -0.67%     
==========================================
  Files         125      126       +1     
  Lines       17822    17985     +163     
==========================================
+ Hits        13993    14001       +8     
- Misses       3829     3984     +155     

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[LeoQuote]

可参考已有的 pr https://github.com/hhyo/Archery/pull/2685 , 或基于此 pr 进行修改开发