Make POS version 6.X available again, pull version 7

[ShiftSetGo]

I think everyone is in agreement that the POS version 7 update is a huge mess. It has broken things for a lot of merchants while bringing almost no benefit. I think Shopify should pull the update and revert back to the latest 6.X version while they sort out the issues with 7. I'm noticing a pattern of Shopify breaking things pretty regularly, or removing things that people are used to, only to end up putting them back later. We moved from Square to Shopify to have unity both in store and online, but Square is far and away superior to Shopify as far as providing stable platforms (POS, not online). When we're talking about how businesses take money for goods and services, we can't have bugs that break people's payment systems with no urgency to fix them.