Multiple TextEdits copy content from each other (Chrome Android)

**Describe the bug**
On Chrome Android, when there are several TextEdits, they copy the text content from each other as soon as you start typing. I tested this on two android devices. On a desktop browser I could not reproduce this issue.

**To Reproduce**
Steps to reproduce the behavior:
1. Open www.egui.rs on Chrome Android
2. Type some text in the TextEdit from the Widget Gallery
3. Open the TextEdit demo and type text there
4. You´ll see that the text from the first TextEdit is copied to the second TextEdit

**Expected behavior**

**Desktop (please complete the following information):**
- OS: Android
- Browser: Chrome Android, latest version

Reproduce the issue on Chrome Android using the Widget Gallery TextEdit and the separate TextEdit demo, then trace the TextEdit handling for the web target. Compare the behavior of the two fields while typing and verify that each retains its own content after the fix.

Written by the indexing model from the issue text.