mesh gen progress stack overflow

[Optiligence]

knossos/mesh/mesh_generation.cpp

Line 217 in 0baebe4

QObject::connect(&watcher, &decltype(watcher)::progressValueChanged, &progress, &QProgressDialog::setValue);

When a lot of signals accumulate asynchronously in the event queue, QApplication::processEvents() in QProgressDialog::setValue results in a stack overflow.