align webgl.rst with style guide, task #10539 (#10625)
align webgl.rst with style guide, task #10539 (#10625)

* align webgl.rst with style guide, task #10539

* alphabetize marker list and link to individual marker and glyph references

* Simplify Support text and use Figure function links instead of classes for supported glyphs

Co-authored-by: Samantha Williamson <726afb8b43b1bb6b23d15e725bee9f5f543b7962@indeed.com>
bokeh/bokeh,bokeh/bokeh,bokeh/bokeh,bokeh/bokeh,bokeh/bokeh