Search box responds to mouse up

[BlueFyre]

Description of the bug

The search box responds to mouse up even though there's no corresponding mouse down event inside the bounds of the box

Project file & How to reproduce

Steps to reproduce:

1. Launch PrusaSlicer (or restart it)
2. Click mouse down anywhere
3. Hover over the search box
4. Release the mouse

Expected:
Nothing happens

Observed:
The search box opens floating on the left side of the screen
Can close it via ESC or the cancel

This is especially annoying since I seem to land my mouse in the search box after dragging the sliced view slider all the way up quite a lot

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.8.1

Operating system

Windows 11

Printer model

Prusa MK4S