Prevent tabbing into end bounds when not in fixed mode

Author: akhenry

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

@@ -24,6 +24,7 @@
            ng-model="textValue"
            ng-blur="restoreTextValue(); ngBlur()"
            ng-mouseup="ngMouseup()"
+           ng-disabled="ngDisabled"
            ng-class="{
                         error: textInvalid ||
                             (structure.validate &&

platform/features/conductor-v2/res/templates/time-conductor.html

@@ -52,6 +52,7 @@
                                      }"
                                      ng-model="formModel"
                                      ng-blur="tcController.updateBoundsFromForm(formModel)"
+                                     ng-disabled="modeModel.selectedKey !== 'fixed'"
                                      field="'end'"
                                      class="time-range-input">
                         </mct-control>