WIP (no internet): refactor names of functions to be cleaner and switch from 'onUpdateAssessmentTracking' in a few places to the new 'parent': onLoadTrackingRegistry (which auto-does the original step)

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  static/er2_303d_assess/js/actions/assessment_summary.js
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  static/er2_303d_assess/js/actions/assessment_tracking.js
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  static/er2_303d_assess/js/actions/server_state.js
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  static/er2_303d_assess/js/constants/action_types.js
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  static/er2_303d_assess/js/containers/app.js
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  static/er2_303d_assess/js/reducers/assessment_tracking.js