Remove esc_url_raw to allow for using of amazon s3 and other shortcodes in file url
API: Add customer count to each period for sales report

Part of #4055
Merge pull request #4540 from maxrice/rest-api-sales-report-tweak

API: Add customer count to each period for sales report
wc_clean on download url instead of esc_url to support shortcodes
Get exception message in cart Closes #4543
Merge pull request #4539 from kloon/master

Remove esc_url_raw to allow for using of amazon s3 and other shortcodes
Include admin functions for less complier on install. Closes #4527
Trigger change for country fields Closes #4546
Tweak code formatting
API: Add top sellers endpoint

Part of #4055
fixed empty coupons select in reports page, fixes #4549
fixed the indentation in includes/admin/reports/class-wc-report-coupon-usage.php
fixed some coding standards in includes/admin/reports/class-wc-report-coupon-usage.php
fixed the order notes tooltip
fixed the indentation in includes/admin/post-types/class-wc-admin-cpt-shop_order.php
fixed some coding standards in includes/admin/post-types/class-wc-admin-cpt-shop_order.php
added a placeholder to select in category widget on reports page
fixed the indentation in includes/admin/reports/class-wc-report-sales-by-category.php
fixed some coding standards in includes/admin/reports/class-wc-report-sales-by-category.php
Merge pull request #4555 from claudiosmweb/added_placeholder_for_category_reports

Fixed untranslatable string in reports by category