Element IDs are not unique for player SVG controls

[cjcolvar]

A 4.1.1 Parsing
Element IDs are not unique

Two or more elements on this page have the same id value. These should be unique.

Duplicates include:

• #SVGRepo_bgCarrier
• #SVGRepo_tracerCarrier
• #SVGRepo_iconCarrier

Found on https://avalon-dev.dlib.indiana.edu/media_objects/g158bh28p using SiteImprove browser extension

[joncameron]

Could be inherent in Video.js or due to our use of custom components.

[elynema]

Looks good in SiteImprove browser plugin on avalon-dev. Still see the error on avalon-staging, so I think this is a fix.