Material stats incorrectly flag 17/16 samplers even if GL4 allows 32

From AnswerHub: Utilising 128 textures in a material does not work in Linux, its still limited to 16 (actual 12) on OpenGL platforms, I looked at the commit that implemented it and I don't see anything limiting it for D3D, PS4, or XBone only.

Linux & Windows under OpenGL 4 should be able to use more than 16 samplers where the device is capable. All 4.3 devices should be capable of a greater min. (32? - need to check specs) which should be the baseline for this mode.

1. Create a material with more than 16 samples.
2. Material editor will warn that this is greater than 16 when running under an OpenGL platform

[OpenGL][BUG] Shared Texture Samples do not work in OpenGL

SM5 on Linux is limited to 16 texture samplers

SM5 on Linux is limited to 16 texture samplers

OpenGL 4.3 mode on Linux bugs

OpenGL 4.3 mode on Linux bugs

[OpenGL][BUG] Shared Texture Samples do not work in OpenGL