WP-4314 Export of view modes per file type
WP-4343 Added new image files for resources callout and twitter
WP-4343 Overriding the icons for callout and twitter to use gsb_resources
WP-4343 Fixes an issue by using type_info_alter.
WP-4343 Fixed an issue where the hook_resources_type_info was not returning the info array.
WP-4343 Switched the default for resources_browser_preview_view_mode to be resource_browser_preview