Fix: Quit OpenTodoList before uninstalling

This fixes the installer on Windows: It will close the app when it is
running before running the uninstaller. This ensures that the
installation runs through (otherwise, the installer will block and wait
for the file to get writable again).
28 jobs for 445-3-34-0-fails-to-install-on-windows-10-when-opentodolist-is-running in 31 minutes and 44 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed android_aab #1523149254

00:28:45

passed android_arm64_v8a #1523149250

00:10:43

passed android_armv7 #1523149248

00:10:19

passed android_x64 #1523149253

00:10:44

passed android_x86 #1523149251

00:10:28

passed appimage #1523149237

00:11:49

passed archlinux-pkgbuild #1523149258

00:08:29

passed clang-format #1523149233

00:01:42

passed cppcheck #1523149232

00:01:27

passed cpplint #1523149234

00:01:34

passed export-sources #1523149236

00:02:49

passed fedora-cmake #1523149238

00:12:03

passed fedora-cmake-system-libs #1523149240

00:12:16

passed flatpak #1523149256

00:14:21

passed ios #1523149247
macos

00:10:57

passed macos #1523149244
macos

00:08:20

passed snap::build #1523149257

00:17:34

passed win32 #1523149241

00:08:01

passed win64 #1523149242

00:08:06

 
  Installer
passed aur_release_check #1523149264

00:01:34

passed sign::android_aab #1523149259
OpenTodoListPrivate

00:02:57

passed sign::android_arm64_v8a #1523149260
OpenTodoListPrivate

00:01:02

passed sign::android_armv7 #1523149261
OpenTodoListPrivate

00:00:56

passed sign::android_x64 #1523149262
OpenTodoListPrivate

00:01:04

passed sign::android_x86 #1523149263
OpenTodoListPrivate

00:01:02

 
  Deploy
manual appstore #1523149265
macos allowed to fail manual
manual aur_release #1523149268
allowed to fail manual
passed snap::edge #1523149269

00:04:23