Describe the bug
Even with delay set to 0s, there is a non-zero delay between pressing hotkey and capturing screenshot that sometimes breaks the purpose of the screenshot.

To Reproduce
Steps to reproduce the behavior:

1. In ksnip main window, set delay to 0s.
2. Set a hotkey to capture rect area (I'm using Print Screen key).
3. Open Firefox Application Menu (click hamburger button on top right)
4. Press the hotkey to capture.

Expected behavior
Firefox Application Menu should be visible in screenshot.

Actual behavior
Menu closes before ksnip captures screenshot. What if I need to capture exactly this menu? This is just an example.

Desktop (please complete the following information):

• OS: Linux
• Manjaro KDE
• X11
• ksnip version 1.9.2
• How did you install ksnip: official repository in Pamac