Changeset [abf23c95a8295ccb3fdf492d98e30e0b0ae51df7] by gregg

Temporary "fix" to conflict between JBrowse track pinning and WebApollo selection/dragging. Allows testing of pinning and selection/dragging, but if tracks are scrolled "under" pinned tracks they actually show up above it. Actual solution will probably involve redoing how ghost drag coords are calculated, and what div they are attached to.
https://github.com/GMOD/jbrowse/commit/abf23c95a8295ccb3fdf492d98e3...