Inserting Tabs in TextView Causes Mouse to Incorrectly Position Cursor

[YourRobotOverlord]

Describe the bug

When clicking to reposition the cursor, the cursor position is offset relative to the number of inserted tabs if clicking after an inserted tab.

To Reproduce

Steps to reproduce the behavior:

1. Run the Text Input Controls scenario.
2. Insert a tab into the TextView.
3. Use the mouse to click a position after the tabstop.

Expected behavior:
Cursor should move to clicked position.

Actual behavior:
Cursor moves to a position offset to the left of the clicked position.
The amount offset seems to be related to the number of tabstops inserted.

OS Information

Repros on Windows 11 and Debian 13

[YourRobotOverlord]

This does appear to be fixed now in #4723: