Over time our config values have grown quite numerous in size.
Unfortunately it also makes the single functions we have for loading and
saving values more error prone.

For example, we were loading the core settings twice when they only
should have been loaded once. In another section, a variable was
shadowing another variable used to load settings from a completely
different section.

Finally, in one other case, there was an extraneous endGroup() call used
that didn't need to be done. This was essentially dead code and also a
bug waiting to happen.

This separates the section loading code into its own separate functions.
This keeps variables only visible to the code that actually needs it,
and makes it much easier to visually see the end of each individual
configuration group. It also makes it much easier to visually catch bugs
during code review.

While we're at it, this also uses QStringLiteral instead of raw string
literals, which both avoids constructing a lot of QString instances, but
also makes it much easier to disable implicit ASCII to QString and
vice-versa in the future via setting QT_NO_CAST_FROM_ASCII and
QT_NO_CAST_TO_ASCII as compilation flags.

Unintentionally introduced in 552d5071

Port citra-emu/citra#3839: "travis: use prebuilt image"

gl_shader_disk_cache: Improve precompiled shader cache generation speed and size

shader_ir: Miscellaneous fixes

kernel/vm_manager: Remove usages of global system accessors

video_core: Silent -Wswitch warnings

Corrections on Half Float operations: HADD2 HMUL2 and HFMA2

kernel/svc: Clean up wait synchronization related functionality

Allow picking a Compatibility Profile for OpenGL.

Port citra-emu/citra#4748: "Launch directly in Mac without terminal"

applets: Add AppletManager and implement PhotoViewer and Error applets

CMakeLists: Ensure we specify Unicode as the codepage on Windows

gl_state: Fix samplers memory corruption

Fix flipping on some games by applying Y direction register

gl_shader_decompiler: Disable variable AOFFI on unsupported devices

service/audctl: Implement GetTargetVolumeMin() and GetTargetVolumeMax()

Support compressed formats on linear textures.

GPU Manager: Implement ReadBlockUnsafe and WriteBlockUnsafe

Implement Kepler Memory on both Linear and BlockLinear.

Do some corrections in conversion shader instructions.

This option allows picking the compatibility profile since a lot of bugs
are fixed in it. We devs will use this option to easierly debug current
problems in our Core implementation.:wq

shader_ir/decode: Miscellaneous fixes to half-float decompilation

kernel/wait_object: Make GetHighestPriorityReadyThread() a const member function

yuzu/bootmanager: Resolve constructor initializer list warnings

kernel/svc: Name supervisor call 0x36

core: Reorganize boot order

It was possible for "samplers" to be read without being written. This
addresses that.

This call was added to the SVC handlers in the 8.0.0 kernel, so we can
finally give it a name.