Hide prices & stocks for some users

[NikoDelarich]

Is your feature request related to a problem? Please describe.
Prices and stock level are restricted information in many companies. Not all users should have access to that information.

Describe the solution you'd like
Add separate permission flags "Show prices" & "Show stocks" to the user permissions (similar to "Show history")
"Prices" should show/hide shopping information & average prices.
"Stocks" should show/hide stocks & minimum instock values.

Describe alternatives you've considered
None

Additional context
Proposed settings:

Should show/hide this information: