Reordered aliases in Doxyfile.

Doxyfile

@@ -260,13 +260,13 @@ ALIASES                = \
     "requires_gl44=@xrefitem requires-gl44 \"Requires OpenGL 4.4\" \"Functionality requiring OpenGL 4.4\"" \
     "requires_gl45=@xrefitem requires-gl45 \"Requires OpenGL 4.5\" \"Functionality requiring OpenGL 4.5\"" \
     "requires_extension=@xrefitem requires-extension \"Requires OpenGL extension\" \"Functionality requiring specific OpenGL extension\"" \
+    "requires_gl=@xrefitem requires-gl \"Requires desktop OpenGL\" \"Functionality requiring desktop OpenGL (not available in OpenGL ES)\"" \
     "extension{2}=<a href=\"http://www.opengl.org/registry/specs/\1/\2.txt\"><tt>\1_\2</tt></a>" \
     "extension2{2}=<a href=\"http://www.opengl.org/registry/specs/\1/\1_\2.txt\"><tt>\1_\2</tt></a>" \
     "extension3{3}=<a href=\"http://www.opengl.org/registry/specs/\1/\3.txt\"><tt>\1_\2</tt></a>" \
+    "requires_gles20=@xrefitem requires-gles20 \"Requires OpenGL ES 2.0\" \"Functionality requiring OpenGL ES 2.0 (not available in ES 3.0 and desktop OpenGL)\"" \
     "requires_gles30=@xrefitem requires-gles30 \"Requires OpenGL ES 3.0\" \"Functionality requiring OpenGL ES 3.0\"" \
     "requires_gles31=@xrefitem requires-gles31 \"Requires OpenGL ES 3.1\" \"Functionality requiring OpenGL ES 3.1\"" \
-    "requires_gl=@xrefitem requires-gl \"Requires desktop OpenGL\" \"Functionality requiring desktop OpenGL (not available in OpenGL ES)\"" \
-    "requires_gles20=@xrefitem requires-gles20 \"Requires OpenGL ES 2.0\" \"Functionality requiring OpenGL ES 2.0 (not available in ES 3.0 and desktop OpenGL)\"" \
     "requires_es_extension=@xrefitem requires-es-extension \"Requires OpenGL ES extension\" \"Functionality requiring specific OpenGL ES extension\"" \
     "es_extension{2}=<a href=\"http://www.khronos.org/registry/gles/extensions/\1/\1_\2.txt\"><tt>\1_\2</tt></a>" \
     "es_extension2{3}=<a href=\"http://www.khronos.org/registry/gles/extensions/\1/\3.txt\"><tt>\1_\2</tt></a>" \