Merge pull request #202 from jonssmall/mean

Sidebar changes
Merge pull request #204 from jonssmall/mean

Highlighting text panel
Merge pull request #206 from jonssmall/mean

While closed, sidebar chevron highlights when a new model is added
Merge branch 'mean' of https://github.com/kmcurry/3Scape into mean
New version of slider
Unobtrusive position for slider tooltips