Fix condition preventing props.onFocus execution

[dshster]

Fixing the prevention of executing props.onFocus after the visibilitychange event occurs.

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Problem
In MR #4878, the behavior of the calendar popup when switching browser tabs has been fixed. However, the props.onFocus callback in the handleFocus method was blocked if a browser tab was switched before.

Changes
I've moved the isOpenAllowed flag condition checking so that the props.onFocus callback will execute as before, regardless of the calendar popup opening.

Contribution checklist

• I have followed the contributing guidelines.
• I have added sufficient test coverage for my changes.
• I have formatted my code with Prettier and checked for linting issues with ESLint for code readability.

[pullrequest]

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[pullrequest]

PullRequest Breakdown

Reviewable lines of change

+ 32
- 2

76% TSX (tests)
24% TSX

Type of change

Fix - These changes are likely to be fixing a bug or issue.

[pullrequest]

The change looks good and matches the description

Xiaoyong W

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Reviewed with ❤️ by PullRequest

[martijnrusschen]

Please check the output of https://github.com/Hacker0x01/react-datepicker/actions/runs/12751165481/job/35545719040?pr=5315. Seems there's a little formatting issue.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.92%. Comparing base (6c6e8d4) to head (1285af4).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5315   +/-   ##
=======================================
  Coverage   96.92%   96.92%           
=======================================
  Files          30       30           
  Lines        3413     3416    +3     
  Branches     1425     1427    +2     
=======================================
+ Hits         3308     3311    +3     
  Misses        103      103           
  Partials        2        2           

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