fix(module: modal): the Title property is default to string.Empty in …

[ElderJames]

…ModalOptions

[中文版模板 / Chinese template]

🤔 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

[codecov-io]

Codecov Report

Merging #887 (2897ea2) into master (48511c8) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master    #887      +/-   ##
=========================================
- Coverage    5.57%   5.56%   -0.02%     
=========================================
  Files         400     400              
  Lines       21190   21282      +92     
=========================================
+ Hits         1182    1184       +2     
- Misses      20008   20098      +90     

Impacted Files	Coverage Δ
components/modal/config/ModalOptions.cs	0.00% <0.00%> (ø)
components/slider/Slider.razor.cs	0.00% <0.00%> (ø)
components/tabs/Tabs.razor.cs	56.32% <0.00%> (+0.81%)	⬆️

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