fix(select): text ellipsis error

[berber1016]

fix #914
当selector文本超出长度时出省略号

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[codecov]

Codecov Report

Merging #920 (d4aaa36) into master (3ebc2bb) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #920   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          149       149           
  Lines         4858      4858           
  Branches      1299      1299           
=========================================
  Hits          4858      4858           

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