[idea for macOS] using retina capable window with regular framebuffer

[dimitre]

I'm using like this:
HIGH_RESOLUTION_CAPABLE = YES
and
glfwWindowHint(GLFW_COCOA_RETINA_FRAMEBUFFER, false);
which results in the same resolution everything the same

But the window decoration and title aren't low res anymore

[danoli3]

If can make a variable to toggle this on an off (pass to the false there), so its as easy to toggle full retina on or off, could this be then changed dynamically... if so.. yes !

[dimitre]

Working great for the projects I'm working on.
If you want this for 0.12.1 I can submit the PR

[danoli3]

Yes please ! macOS non-retina apps look so broke without header at retina