Unselectable text field for namespace filter

[Cenness]

Setup

• Rancher version: 2.10.0
• Rancher UI Extensions: None
• Browser type & version: Firefox 132.0.2 and Chrome 131.0.6778.86

Describe the bug
Text in namespace filter can't be selected with mouse. Both double-click and hold-and-move do nothing.

To Reproduce

1. Explore a cluster
2. Click on namespace selector
3. Write something in filter field
4. Change your mind and try to select all with mouse double-click or hold-and-move

Result
No selection

Expected Result
All symbols in field are selected

Screenshots
https://github.com/user-attachments/assets/af361f65-7002-4e4c-b270-67537d4a5298

Additional context
Mouse selection worked in 2.9.3
Ctrl-A and Shift-arrows work