Add option --qmljsdebugger only if build with QML module

Since Qt5.14 (via this commit) an help option --help-all exists, which will be always added.

Current behavior:
If you develop a CUI --help-all only includes on option:

  --qmljsdebugger <value>     Activates the QML/JS debugger with a specified
                              port. The value must be of format
                              port:1234[,block]. "block" makes the application
                              wait for a connection.

Expected behavior:

• Variant 1
  qmljsdebugger will be only added, in case the application a an application using QML (or using the QML module). Therefore if -qmljsdebugger is not present -help-all should not be added, as there exists no Qt option.
• Variant 2)
  qmljsdebugger will be only in debug mode available, as I don't believe it is relevant to enduser
• Variant 3)
  QCommandLineParser::addHelpOption() will be changed to QCommandLineParser::addHelpOption(bool includeQtOptions = true), so the developer can decide if the user should be confronted with advanced options