libgui: Added the de::gl namespace for GL related enums
While the GL classes itself are in the de namespace just like mostclasses, having all the GL enums there as well could easily causename clashes.
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libgui: Added the de::gl namespace for GL related enums
While the GL classes itself are in the de namespace just like most
classes, having all the GL enums there as well could easily cause
name clashes.