Compilation of qml puppet blocks Qt Creator for half a minute

When I open design mode with a qml file open, the whole Qt Creator UI is blocked for as long as puppet compilation takes (several dozen seconds). Except for the progress bar, of course.

This is pretty ugly when e.g. ending up in design mode accidentally by mis-clicking or pressing the wrong shortcut. It would be good if either the process only blocked the design mode widget itself, or if it at least had a way to cancel the operation.

You should mention that this happen only once per release.

Best way in my opinion would be to do the compilation in the background as the kit is created. The design button should be disabled so long there is no valid Qml puppet and a tool tip should be provided.

There is the case of not supported Qt versions which are non native Qt's like ARM. There is no way that we can support an ARM version. We can fall back to a other puppet but this Qt could have different plug-ins installed. Best way would be to have something like sibling kits which provide the same feature set.