Hello, Probably I've missed something, or what I propose is unpractical (or too late), but here I go, anyway:
If the frameworks branch still depends on Qt 4, Is it possible to have a "public" version of it once the refactoring has been completed, but before it depends on Qt 5? It could be used as a frozen master for SC 4.9 (or SC 4.10?) and, to some degree, make the migration path to it easier. Let's say it is Milestone 1 of 2. After that Milestone, it could be changed to use Qt 5. Best Regards.