Fix fields table display problems

There is some display problems in the Fields table.

Problems:

• Always empty column Obligation or Condition
• Some empty rows
• Some values are empty
• Fild Type column is too big

added Frontend label

changed title from tableau fields management to Fields table display

changed the description

changed title from Fields table display to Fields table display bugs

changed title from Fields table display bugs to Fix fields table display problems

assigned to @remi.bisson

mentioned in merge request !18 (merged)

mentioned in merge request !19