Add style field to woocommerce_wp_xxxxx_input

Closes #6888
Fix annoying white space
Moved do action of 'woocommerce_admin_css' to avoid possible add action from debug plugin as "Debug Bar" and "Debug Bar Slow Actions"
See screen: http://d.pr/i/1fYX1/7ZiItezr
Merge pull request #6891 from antoscarface/master

Moved deprecated action inside IF
Merge pull request #6890 from bryceadams/patch-6888

Add style field to woocommerce_wp_xxxxx_input
[2.2] Ensure float is safely converted to string
Introduced 'woocommerce_find_rates' filter.
Introduced 'woocommerce_ajax_calc_line_taxes' filter.
Merge branch 'master' of github.com:woothemes/woocommerce
remove frontend dashicons, tweak loader
Introduced filter woocommerce_copy_to_theme_folder
Added trim to avoid errors
Introduced woocommerce_delete_from_theme_folder filter
Merge pull request #6892 from SiR-DanieL/patch-2

Introduced filters for copy/delete templates
Allows custom directory for email templates

cc @SiR-DanieL