Print a warning when importing a repeating NPOT texture in a GLES2 project
Print a warning when importing a repeating NPOT texture in a GLES2 project

Repeating NPOT textures are not guaranteed to be displayed correctly
in GLES2, since the specification does not mandate support for it.

The warning is also displayed in GLES3 projects that are configured
to allow falling back to GLES2.

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot