which is required for Qt 6.5.0

It was deprecated in Qt 6.4. Basically, just need to specify `globalPos`

It was deprecated during the Qt 6.8 beta phase, but it looks like this deprecation has been postponed to Qt 6.9.

Anyway, there is now a better alternative called `checkStateChanged`, that uses `Qt::CheckState` instead of `int`.

To be sure that we're using a new-enough version for all Qt 6.8 features

I verified that they don't do anything scary, so let's use them, to keep our code in line with the documentation, and to be sure that we're ready to use modern Qt/CMake possibilities.

When an error occurs while creating a component, don't cause even more errors by reading from `null` at `dialogObj.object.objectId`

needed for using private classes like Item_p

Private KDDockWidgets classes use KDBindings, which in turn uses the emit term, which leads to compilation errors.
Here we turn off the use of emit - now we use Q_EMIT