keymap_editor: Fix filter input element alignment (#38895)
Bartosz Kaszubowski
created
# Why
I have spotted that Keymap Editor filter input (editor) is misaligned
vertically.
# How
Switch the input wrapper to flex layout, use `items_center` to align
editor vertically in center of the wrapper.
Release Notes:
- Fixed Keymap Editor filter input alignment
# Test plan
I have tested the change locally and compared the UI before and after,
to make sure that change does not affect the size of the wrapper
element.
### Before
<img width="1622" height="428" alt="Screenshot 2025-09-25 at 18 18 59"
src="https://github.com/user-attachments/assets/7d09be5c-6caf-4873-8ecf-2542851cb40a"
/>
### After
<img width="1622" height="428" alt="Screenshot 2025-09-25 at 18 07 18"
src="https://github.com/user-attachments/assets/540fcb3e-691d-4fb7-8130-2ed45ddc0adc"
/>