Blender Git Loki

Fix and compile time option for workspace object-mode

Now we also sync the workspace object-mode when selecting a different object. It's still quite easy to get the mode of the active object and the one stored in the workspace out of sync, but fixing this would require a bunch of changes that would only be temporary anyway. Remember, plan is to make object-mode a purely workspace level option, not storing it within the object anymore.
The current object-mode syncing isn't supposed to stay there for long, I added a #define USE_WORKSPACE_MODE so we can disable it easily (DNA still stores it in files though).