Fields with a minimum length property are not validated to ensure the minimum length is met on entry (or save)

[thomasplevy]

Reproduction Steps

• Visit a form
• Select the user password form (also possible with textarea field's "rows" property in custom fields)
• Enter a value less than 6 (the minimum length set on the TextControl input)

Related to https://github.com/gocodebox/lifterlms-custom-fields/issues/35

Expected Behavior

• I should be unable to enter (or save) a value less than 6 (2 on the textrea)

Actual Behavior

• I am able to enter and save a value less than 6 (2 on the textrea)