refactor: improve password input toggle button state display

[ruibaby]

What type of PR is this?

/area ui
/kind improvement
/milestone 2.20.x

What this PR does / why we need it:

优化密码输入框的明文切换图标的状态显示。

before:

after:

Does this PR introduce a user-facing change?

优化密码输入框的明文切换图标的状态显示。

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[guqing]

/lgtm

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: guqing

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Needs approval from an approver in each of these files:

• ui/OWNERS [guqing]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.71%. Comparing base (5b2bdfd) to head (8e80fa8).
Report is 46 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6800      +/-   ##
============================================
- Coverage     58.00%   57.71%   -0.30%     
- Complexity     3977     4020      +43     
============================================
  Files           696      711      +15     
  Lines         23517    23917     +400     
  Branches       1567     1574       +7     
============================================
+ Hits          13641    13803     +162     
- Misses         9255     9493     +238     
  Partials        621      621              

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