Improve checkbox api

[itayod]

GOAL:

Create an easy checkbox api that will support data type of boolean, Array, string / number

SUGGESTION:

• checkbox without value will be referred as boolean type.
• checkbox with value and unique ctrlFormField name will be get their value from the value attribute.
• checkbox with more then one ctrlFormField will be referred as Array.

CURRENT BEHAVIOR:

checkbox with asBoolean are referred as boolean otherwise they referred as Array.