message: fix(demo): fix for timepicker demo layout
  fixed fields width for `Custom steps`
diff: <pre class="alert alert-info">Time is: {{mytime}}</pre>
  <div class="row">
  - <div class="col-xs-6">
  + <div class="col-xs-6 col-6 col-md-3">
  Hours step is:
  <select class="form-control" [(ngModel)]="hstep">
  <option *ngFor="let opt of options.hstep" [value]="opt">{{opt}}</option>
  </select>
  </div>
  - <div class="col-xs-6">
  + <div class="col-xs-6 col-6 col-md-3">
  Minutes step is:
  <select class="form-control" [(ngModel)]="mstep">
  <option *ngFor="let opt of options.mstep" [value]="opt">{{opt}}</option>
  