fix(module: tree): Multiple should not take effect when Ctrl is not pressed.

[YongQuan-dotnet]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• Bundle size optimization
• Performance optimization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Changelog is provided or not needed

[github-actions]

[codecov]

Codecov Report

Patch coverage: 40.74% and project coverage change: -0.02 ⚠️

Comparison is base (dbf8780) 45.36% compared to head (a20dd7c) 45.34%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3350      +/-   ##
==========================================
- Coverage   45.36%   45.34%   -0.02%     
==========================================
  Files         558      558              
  Lines       26807    26827      +20     
  Branches      267      267              
==========================================
+ Hits        12162    12166       +4     
- Misses      14605    14621      +16     
  Partials       40       40              

Impacted Files	Coverage Δ
components/core/JsInterop/DomEventListener.cs	0.00% <0.00%> (ø)
components/tree-select/TreeSelect.razor	0.00% <0.00%> (ø)
components/tree/TreeNode.razor.cs	27.35% <0.00%> (-0.09%)	⬇️
components/tree/Tree.razor.cs	26.98% <55.00%> (+2.52%)	⬆️

... and 2 files with indirect coverage changes

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[ElderJames]

LGTM