Replace .vbs hack to update maintenance tool binary on Windows

Do the replacing of the executable instead by:
  - The original MT renames itself to a temporary name
  - The new MT is renamed to the destination file name
  - The new MT is started as a detached process, it polls to delete the
    temporary MT (requires that the parent process exited)

Introduce hidden options, cleanup-update and cleanup-update-only to
start the maintenance tool in a mode for deleting the old binary.

Also fix missing verbose messages on hard restart of maintenance tool
after update. Due to QProcessWrapper::startDetached using a modified
implementation of the wrapped class (QProcess) method, the detached
process was started with a new console instead of inheriting the
console of the parent process. Fix by adding a second variant of the
QProcessWrapper::startDetached functions using the QProcess
implementation.

Task-number: QTIFW-2625
Change-Id: Iebc5b04befa1e79765217f93723f977556e03d90
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Katja Marttila <katja.marttila@qt.io>

0 files changed, 0 insertions, 0 deletions