Fix issues in rollout creation dialog (#1329)

* Introduce text input converter and validator to prevent problems with rollout group definitions.
* Add 2023 bosch.io license
* add new header to pom
* Extend usage of new TrimmingStringConverter.
* fixed compile error

hawkbit-ui/src/main/resources/messages.properties

@@ -798,6 +798,7 @@ message.rollout.duplicate.check = Rollout [ {0} ] must be unique, entered value
 message.rollout.name.empty = Please enter a name for Rollout
 message.correct.invalid.value = Please correct invalid values
 message.enter.number = Please enter number
+message.field.validator.numeric.invalid.input = Value {0} should be in a numeric format
 message.rollout.field.value.range = Value should be in range {0} to {1}
 message.rollout.filter.target.exists = The selected target filter does not match any existing target
 message.rollout.max.group.size.exceeded = The maximum group size of {0} targets is exceeded. Please increase the number of groups or select a different target filter