Rudder

When creating a new Technique and in the Parameters tab,

• I could save an Enum parameter with filling anything (for Display name and Value) :
  

=> But when creating a directive from it displays an error, for example when two parameters have "empty enums" we have both errors :

• Also, when we only fill Display name, we get the display name but the same error at save (because the value are still "empty")

• Lastly, when both values are filled, in the directive parameters it is impossible to have a default value (but in the illegal case when Value is empty, it is selected by default)

• we should display an error and should not be able to save a technique when at least one Enum has an empty Value
• we should add a hint that Display name is optional and will inherit Value if empty
• we should have the possibility to input a default value for an enum (by selecting one of the values) and for a text