[UI] Paper doll inventory and flask bar

I find the flask spaces in both the paper doll inventory tab and on the primary interface confusing and redundant.

I recall in 0.9.2 where players in game would regularly ask global how they should equip flasks because they were trying to drop them into the flask bar.

I also remember that changes needed to be made to UI because it was possible at one point to remove the flasks directly from the primary interface when trying to click to activate, resulting in changes so that the bar is locked unless the inventory tab is up.

I propose that the flask slots on the paper doll inventory tab be removed and that a row be added to the backpack to utilize the room this creates on the tab

This will reduce confusion for new players and eliminate the redundancy. It will also help address requests for rotatable inventory items. Flasks can be equipped when the inventory tab is open by dropping directly into the primary interface bar.

I find the backpack space of 5x12 an odd size to use, because all the inventory item graphics grow in vertical dimension, not horizontal dimension.

When item sizes range in height from 1 to 4 rows, it creates a lot of unusable space when the height of the backpack is only five rows because there are limited sorting variations:
4 row item + 1 row item
3 row item + 2 row item
3 row item + 1 row item + 1 row item
2 row item + 2 row item + 1 row item
1 row item x5

With six rows, all of a sudden the backpack feels like it is much easier to manage inventory because there are now more stacking options:
4+2
4+1+1
3+3
3+2+1
3+1+1+1
2+2+2
2+2+1+1
2+1+1+1+1
1+1+1+1+1+1

There are now nine vertical variations with a six row backpack compared to only five variations when the backpack is only five rows tall.

The growth of the backpack by only 12 squares (20%) will increase the utility of the backpack by 80%! In my opinion, this will greatly diminish complaints about backpack size, and it also makes the UI more intuitive.