ensure storage is writable when setting support flag. fixes #6755
Introduce `woocommerce_product_is_on_sale` filter

This filter is useful for extensions like Measurement Price Calculator
which alter the product price quite a bit, but would still like the
sale badge to appear :)

Current workaround is to use three filters ( `woocommerce_get_price`,
`woocommerce_get_regular_price`, and `woocommerce_get_sale_price` )
which most extension may be using already, but not all need/want to
alter these prices.
Simplify the condition for custom menu order :)
Merge pull request #6757 from tamarazuk/master

Introduce `woocommerce_product_is_on_sale` filter
Modified since current_user_can() returns boolean ;)
Merge pull request #6756 from joeflynn/quota-exceeded

ensure storage is writable when setting support flag. fixes #6755
Merge pull request #6765 from bryceadams/master

Add placeholder attribute for settings API #6764
Merge pull request #6773 from axisthemes/menu-order

Simplify the condition for custom menu order
gallery column css. closes #6767
coding standards find/replace fail ^^. closes #6775
Cleanup for the WC_Admin_Welcome Class
Unused var if needed in future we can use WC_PLUGIN_BASENAME constant
use of final class helper function
Some shipping class tidyup
Some gap added intensionally ;)
Merge remote-tracking branch 'upstream/master' into welcome
Some mistake revoked
Bulk edit sales schedule on variations

Closes #6300
Some curley braces
Some modification for theme-support notice