Flameshot quits after using Text tool

Summary:
After using the text tool: if you click any other tool, the editing mode will end.

Steps to reproduce:
- Call flameshot with `flameshot gui`.
- Define the area to be screenshotted.
- Select the text tool.
- Click somewhere and write anything.
- Click somewhere else on the canvas to finish editing with the text tool.
- Click the pen tool.
- EXPECTED: you can use the pen tool now.
- ACTUAL: editing ends.

Reproducibility: 100%

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: flameshot 11.0.0-2
ProcVersionSignature: Ubuntu 5.15.0-41.44-generic 5.15.39
Uname: Linux 5.15.0-41-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Sat Jul 23 16:00:49 2022
InstallationDate: Installed on 2022-02-14 (158 days ago)
InstallationMedia: Xubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
SourcePackage: flameshot
UpgradeStatus: Upgraded to jammy on 2022-07-18 (5 days ago)