Add beer description and averages

[erickok]

Add to the beer details screen additional fields such as:

• Commercial description
• Weighted average
• Real average

In a visually appealing way, without taking up extra screen space... :blush:

[erickok]

Fixed with merge of the custom lists feature in 54550cd34256dc4e4304f9b6480e9931a08b4b68.