Examples: Glut: Added note about missing cursor support. (#2375, #2465)

examples/imgui_impl_glut.cpp

@@ -6,6 +6,7 @@
 
 // Issues:
 //  [ ] Platform: GLUT is unable to distinguish e.g. Backspace from CTRL+H or TAB from CTRL+I
+//  [ ] Platform: Missing mouse cursor shape/visibility support.
 //  [ ] Platform: Missing clipboard support (not supported by Glut).
 //  [ ] Platform: Missing gamepad support.
 

examples/imgui_impl_glut.h

@@ -6,6 +6,7 @@
 
 // Issues:
 //  [ ] Platform: GLUT is unable to distinguish e.g. Backspace from CTRL+H or TAB from CTRL+I
+//  [ ] Platform: Missing mouse cursor shape/visibility support.
 //  [ ] Platform: Missing clipboard support (not supported by Glut).
 //  [ ] Platform: Missing gamepad support.