Feature/frontend UI ux cycle

[kimcoleman]

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Changes proposed in this Pull Request:

Keeping this a draft PR to see how the merge will go. This will help me see what the old selectors were so I can build a mega function using the pmpro_element_class filter to "bridge fix" old sites with heavy custom styles.

How to test the changes in this Pull Request:

I'm going to set up a dev for our team to use that has various WP themes and a theme switcher installed so we can preview the changes.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully run tests with your changes locally?

Changelog entry

• FEATURE: Added two style variations and three color settings to style the frontend pages.
• FEATURE: Now offering a smartly generated non-member/no-access message option in addition to the custom.
• ENHANCEMENT: Now offering a way to disable all unnecessary design layer styles and load base required CSS only.
• BUG FIX: Removed unused image files.
• BUG FIX: Removed unused Google charts JavaScript file.
  apply_filters_deprecated( 'pmprorh_user_table_fields', array( array( 'user_url' ) ), 'TBD', 'pmpro_user_table_fields' );
• ENHANCEMENT: Added filter pmpro_user_table_fields filter that is meant to replace the pmprorh_user_table_fields filter. The old filter is still applied if in place, but will be deprecated eventually.
• ENHANCEMENT: Added filter pmpro_field_repair_non_associative_options filter that is meant to replace the pmprorh_repair_non_associative_options filter. The old filter is still applied if in place, but will be deprecated eventually.
• ENHANCEMENT: Added filter pmpro_field_show_required_on_profile filter that is meant to replace the pmprorh_show_required_on_profile filter. The old filter is still applied if in place, but will be deprecated eventually.
• ENHANCEMENT: Added filter pmpro_field_get_html filter that is meant to replace the pmprorh_get_html filter. The old filter is still applied if in place, but will be deprecated eventually.
• ENHANCEMENT: Standardizing CSS selectors to make theming a PMPro site more straightforward. We will custom code that leverages the pmpro_element_class filter to put back old selectors as we see a need.
• BUG FIX/ENHANCEMENT: Removed unused function pmpro_getClassForField().
• DEPRECATED: Removed the ability to customize no access messages for the RSS feed and the secondary option for logged out members. Use the filters in place of these to customize.

Enter a summary of all changes on this Pull Request. This will appear in the changelog if accepted.