DolphinQt: link to Core, resource system

Screenshot of what it looks like now:

![snapshot1](https://cloud.githubusercontent.com/assets/2175324/4690126/cd70fa1e-56da-11e4-8acd-dd81d8c355d7.png)

No clue why this still shows `_size`. I've fixed it, and you can see that I have by looking at the "Changes" tab...