UI Builder inspector’s checkbox fields can be activated when clicking anywhere in the value field

Steps to reproduce:
1. Create a new project
2. Create and open a new UI Document (Assets → Create → UI Toolkit → UI Document)
3. Add a “VisualElement” to the UI Builder Hierarchy
4. Click on the “VisualElement” to open the UI Builder Inspector
5. In the Attributes tab, find “Focusable”
6. Click anywhere in the line where the attribute is, except for the checkbox itself

Expected result: Only the checkbox field works for activation
Actual result: The whole area around the checkbox works for activation

Reproducible in: 2021.3.48f1, 2022.3.57f1, 6000.0.36f1, 6000.1.0b4, 6000.2.0a1

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note: Happens with any other element that has a checkbox