message: FormItem: use Removable
diff: .FormItem {
  - padding-top: 12px;
  - padding-bottom: 12px;
  + padding: 12px 16px;
  display: block;
  }
  color: var(--field_valid_border);
  }
  +.FormItem .Cell,
  +.FormItem .SimpleCell,
  +.FormItem .RichCell,
  +.FormItem .CellButton,
  +.FormItem .Radio,
  +.FormItem .Checkbox {
  + box-sizing: content-box;
  + margin-left: -16px;
  + margin-right: -16px;
  +}
  +
  /**
  * iOS
  */
  .FormItem--ios .CellButton,
  .FormItem--ios .Radio,
  .FormItem--ios .Checkbox {
  - width: 100%;
  - box-sizing: content-box;
  margin-left: -12px;
  margin-right: -12px;
  }
  /**
  - * Android & VKCOM
  + * ANDROID & VKCOM
  */
  -.FormItem--android,
  -.FormItem--vkcom {
  - padding-left: 16px;
  - padding-right: 16px;
  +.FormItem--android .Removable__remove,
  +.FormItem--vkcom .Removable__remove {
  + margin-right: -16px;
  }
  -.FormItem--android .Cell,
  -.FormItem--vkcom .Cell,
  -.FormItem--android .SimpleCell,
  -.FormItem--vkcom .SimpleCell,
  -.FormItem--android .RichCell,
  -.FormItem--vkcom .RichCell,
  -.FormItem--android .CellButton,
  -.FormItem--vkcom .CellButton,
  -.FormItem--android .Radio,
  -.FormItem--vkcom .Radio,
  -.FormItem--android .Checkbox,
  -.FormItem--vkcom .Checkbox {
  - width: 100%;
  - box-sizing: content-box;
  - margin-left: -16px;
  - margin-right: -16px;
  +.FormItem--android.FormItem--sizeY-compact .Removable__remove,
  +.FormItem--vkcom.FormItem--sizeY-compact .Removable__remove {
  + margin-left: 2px;
  + margin-right: -14px;
  }
  