UISliderTemplateWithLabels isn't defined in Classic Era 1.15.4

[Meorawr]

The UISliderTemplateWithLabels template defined in SliderTemplates.xml is missing as this file, despite being present, isn't loaded as part of the Classic Era TOC file for SharedXML in 1.15.4.56419.

This file is correctly loaded as part of the Cataclysm client. As UISliderTemplateWithLabels template is intended to serve as a replacement for the deprecated OptionsSliderTemplate, not having this around is problematic.

Test case

The following two commands shouldn't error with Couldn't find inherited node "UISliderTemplateWithLabels".

/run CreateFrame("Slider", nil, nil, "OptionsSliderTemplate")
/run CreateFrame("Slider", nil, nil, "UISliderTemplateWithLabels")

[Meorawr]

Appears to be resolved in 1.15.4.56857.