text: Title: [🐛 BUG] Filtering on string in tables has a bad icon
  Body: ### What went wrong? 🤔
  
  Since [PR#2087](https://github.com/Avaiga/taipy/pull/2087), addressing #426, there's an icon in the string field indicating whether or not the filtering should take into account the casing.
  
  This icon is ugly:
  ![image](https://github.com/user-attachments/assets/bc462b0e-2ea8-4ba7-81d6-af35cf97f5c6)
  
  
  ### Expected Behavior
  
  A more explicit icon (which should not be difficult to find) is visible.
  
  ### Version of Taipy
  
  ' develop' branch at the time of creating this issue.
  
  ### Acceptance Criteria
  
  - [ ] A unit test reproducing the bug is added.
  - [ ] Any new code is covered by a unit tested.
  - [ ] Check code coverage is at least 90%.
  - [ ] The bug reporter validated the fix.
  - [ ] Related issue(s) in taipy-doc are created for documentation and Release Notes are updated.
  
  
  ### Code of Conduct
  
  - [X] I have checked the [existing issues](https://github.com/Avaiga/taipy/issues?q=is%3Aissue+).
  - [ ] I am willing to work on this issue (optional)