GLFW input handler is now working with GLFW3

[Megaxela]

Input into text fields is not working with GLFW3 library.
It's not working because of wrong implementation in file source/platform/include/Gwork/Input/GLFW3.h.
I will make pull request with correct implementation soon.

• Operating System (name & version): Any
• Compiler (name & version): gcc 8.2
• Target renderer: OpenGL, OpenGL Core Profile
• cmake command-line used: cmake -DRENDER_OPENGL=On .

[billyquith]

Thanks for the catch. 👍