shortcuts twice

Before creating a new issue, see list of [known
issues](https://copyq.readthedocs.io/en/latest/known-issues.html).

**Describe the bug**
When I use copyQ, I must press twice the shortcut to paste in a window.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to a text editor
2. Click on copy a text in the clipboard
3. Press enter to creat a new line
4. Try to paste the text with the shortcut
5. You must press a second time the shortcut

**Expected behavior**
Just one time for the shortcut
**Screenshots**
If applicable, add screenshots to help explain your problem.

**Version, OS and Environment**
(Get details from `copyq version` command if possible.)
- Application Version [e.g. 3.7.2] 6.2.0
- OS [e.g. Windows] linux mint
- Desktop environment, window manager (if applicable) cinnamon

**Additional context**
Add any other context about the problem here.