Optimized messages that were repetitive and added ability for core errors to specify more details optionally.

- Made LoadKernelSystemMode return a pair consisting of a system mode and a result code (Could use review).
- Deleted ErrorOpenGL error code in favor of just having ErrorVideoCore.
- Made dialog messages more clear.
- Compared archive ID in fs_user.cpp to ArchiveIdCode::NCCH as opposed to hex magic.
- Cleaned up some other stuff.

CAM: use IPCHelper

Split-up kernel.h

swrasterizer: implemented TextureCube

Now that HandleTable doesn't directly depend on WaitObject anymore, this
can be separated from the main kernel.h header.

CMake: Use CMake target properties for all libraries

This isn't necessary anymore since plain Get works correctly for
WaitObjects.

OpenGL: Improve accuracy of quaternion interpolation

Dependencies and build system cleanup

Separates the file into sections and re-orders things to fit in them

Dynarmic already adds the correct include paths to the library target.

This used to be required to support both Qt4 and Qt5, but we dropped Qt4
so it's not needed anymore.

Modules didn't correctly define their dependencies before, which relied
on the frontends implicitly including every module for linking to
succeed.

Also changed every target_link_libraries call to specify visibility of
dependencies to avoid leaking definitions to dependents when not
necessary.

video_core didn't even properly use them, and they were the source of
many otherwise-unnecessary dependencies from core to video_core.

This removes a dependency inversion between core and common. It's also
the proper place for the file since it makes screen layout decisions
specific to the 3DS.