WooCommerce Multi Currency Premium 2.3.7

- Update: Add filter 'wmc_previous_currency_cart_item_price' to format cart item price
- Update: Add compatible code with GIFT4U – Gift Cards All in One for Woo
- Update: Add setting description
- Update: Change ajax reload filter price code flow
- Fix: Conflict with WooCommerce Subscriptions

- Fix: Conflict with WooCommerce Wholesale Prices Premium
- Fix: Conflict with WooCommerce Extra Product Options by ThemeHigh
- Update: Add setting to switch currency when user login

- Fix: Finance API XE return wrong data
- Update: Add setting to change currency switcher layout
- Update: Add setting to change currency switcher color, background
- Update: Add setting to display product price collate in multiple currencies