dashboard及审批流审批人展示优化

[fixpng]

1. dashboard优化，增加时间选项并可直接复制使用（改白底）
   

2. Fix: 审批流审核人展示优化：审批流审核人展示问题 #2931
   

[codecov]

Codecov Report

Attention: Patch coverage is 85.09317% with 24 lines in your changes missing coverage. Please review.

Project coverage is 78.49%. Comparing base (12581e3) to head (b2b53bc).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
common/dashboard.py	84.46%	16 Missing ⚠️
sql/views.py	72.00%	7 Missing ⚠️
sql/engines/elasticsearch.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2932      +/-   ##
==========================================
- Coverage   78.50%   78.49%   -0.02%     
==========================================
  Files         125      125              
  Lines       17701    17788      +87     
==========================================
+ Hits        13896    13962      +66     
- Misses       3805     3826      +21     

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[LeoQuote]

安一个black 用black 自动修

[fixpng]

安一个black 用black 自动修

谢谢大佬，我晚上试试