[Plots] #638 added onchange handling in order to synchronize forms with domain object model.

Fixed failing test

Added tests

jslint errors

Minor refactoring of layout bundle

revert layout/bundle.json

platform/commonUI/general/res/templates/controls/datetime-field.html

@@ -23,6 +23,7 @@
       ng-controller="DateTimeFieldController">
     <input type="text"
            ng-model="textValue"
+           ng-change="structure.onchange(ngModel[field])"
            ng-blur="restoreTextValue(); ngBlur()"
            ng-class="{
                         error: textInvalid ||