[QTI] - The keyboard combination Ctrl/Cmd+Shift+S is not working for applying strikethrough formatting #6322

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Observed behavior

Observed while testing: #6151

Applying the keyboard combination Ctrl/Cmd+Shift+S doesn't result in showing the text with strikethrough formatting, it changes the font size to Small.

Expected behavior

Selecting text and applying the keyboard combination Ctrl/Cmd+Shift+S should result in applying strikethrough formatting to the text.

Steps to reproduce the issue

1. Sign in to Studio at unstable
2. Go to Channel > Channel editor > New exercise
3. Create an exercise and add a question
4. Add text in the editor and attempt to apply the keyboard combination Ctrl/Cmd+Shift+S

Usage Details

• Studio Unstable
• OS: Windows 11
• Browser: Chrome, Firefox