ci(ui-tests): use a better way to call AutoHotKey

By using the `/ErrorStdOut` flag (which required `| Out-Default` because
`AutoHotKey64.exe` is a GUI program and would therefore not show any
stderr otherwise), we can avoid those blocking dialogs that are so hard
to diagnose when running AutoHotKey in a GitHub workflow.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/ui-tests.yml

@@ -84,9 +84,8 @@ jobs:
       - name: Run UI tests
         id: ui-tests
         run: |
-          $p = Start-Process -PassThru -FilePath "${env:RUNNER_TEMP}\ahk\AutoHotKey64.exe" -ArgumentList ui-tests\background-hook.ahk, "$PWD\bg-hook"
-          $p.WaitForExit()
-          if ($p.ExitCode -ne 0) { echo "::error::Test failed!" } else { echo "::notice::Test log" }
+          "${env:RUNNER_TEMP}\ahk\AutoHotKey64.exe" /ErrorStdOut /force ui-tests/ctrl-c.ahk ui-tests\background-hook.ahk "$PWD\bg-hook" 2>&1 | Out-Default
+          if (!$?) { echo "::error::Test failed!" } else { echo "::notice::Test log" }
           type bg-hook.log
           if ($p.ExitCode -ne 0) { exit 1 }
       - name: Show logs, if canceled