Changed 'Anisotropic Filtering' to a MULTIX option and added the options No, 2x, 4x, and 8x.  Previously enabling Anisotropic Filtering only set the value at 1, which made no visual difference.
Removed "uiScript glCustom," from Anisotropic Filtering.
Bring the GL1 renderer into line with the GL3 renderer wrt anisotropy.
Merge local branch 'theyain'
s/x/×/ for anisotropic filtering and multisampling menu options.
Add 16× to the anisotropic filtering menu options.
renderer: instead of rejecting out-of-range anisotropy values, clip them.