Commented out redirecting functions/enums names that were marked obsolete in 1.77 and 1.78 (June 2020): (#3361)

- DragScalar(), DragScalarN(), DragFloat(), DragFloat2(), DragFloat3(), DragFloat4() with signature ending with (..., float power = 1.0f)
- SliderScalar(), SliderScalarN(), SliderFloat(), SliderFloat2(), SliderFloat3(), SliderFloat4() with signatures ending with (..., float power = 1.0f)
- BeginPopupContextWindow(const char*, ImGuiMouseButton, bool)