message: fix(datepicker): using icons instead of innerHTML chevrons to fix issue with webworkers
  fix(daypicker): condittionally using chevron based on bs
  removed unused interface for templates
  not using span anymore
diff: @@ -2,22 +2,6 @@ import { Component, OnInit } from '@angular/core';
  import { isBs3 } from '../utils/ng2-bootstrap-config';
  import { DatePickerInnerComponent } from './datepicker-inner.component';
  -// write an interface for template options
  -const TEMPLATE_OPTIONS: any = {
  - 'bs4': {
  - ARROW_LEFT: '&lt;',
  - ARROW_RIGHT: '&gt;'
  - },
  - 'bs3': {
  - ARROW_LEFT: `
  - <i class="glyphicon glyphicon-chevron-left"></i>
  - `,
  - ARROW_RIGHT: `
  - <i class="glyphicon glyphicon-chevron-right"></i>
  - `
  - }
  -};
  -
  @Component({
  selector: 'daypicker',
  template: `
  @@ -25,11 +9,18 @@ const TEMPLATE_OPTIONS: any = {
  <thead>
  <tr>
  <th>
  - <button type="button"
  + <button *ngIf="!isBs4"
  + type="button"
  class="btn btn-default btn-secondary btn-sm pull-left"
  (click)="datePicker.move(-1)"
  - tabindex="-1"
  - [innerHTML]="CURRENT_THEME_TEMPLATE.ARROW_LEFT">
  + tabindex="-1">
  + <i class="glyphicon glyphicon-chevron-left"></i>
  + </button>
  + <button *ngIf="isBs4"
  + type="button"
  + class="btn btn-default btn-secondary btn-sm pull-left"
  + (click)="datePicker.move(-1)"
  + tabindex="-1">&lt;
  </button>
  </th>
  <th [attr.colspan]="5 + (datePicker.showWeeks ? 1 : 0)">
  @@ -42,11 +33,18 @@ const TEMPLATE_OPTIONS: any = {
  </button>
  </th>
  <th>
  - <button type="button"
  + <button *ngIf="!isBs4"
  + type="button"
  + class="btn btn-default btn-secondary btn-sm pull-right"
  + (click)="datePicker.move(1)"
  + tabindex="-1">
  + <i class="glyphicon glyphicon-chevron-right"></i>
  + </button>
  + <button *ngIf="isBs4"
  + type="button"
  class="btn btn-default btn-secondary btn-sm pull-right"
  (click)="datePicker.move(1)"
  - tabindex="-1"
  - [innerHTML]="CURRENT_THEME_TEMPLATE.ARROW_RIGHT">
  + tabindex="-1">&gt;
  </button>
  </th>
  </tr>
  @@ -85,12 +83,8 @@ export class DayPickerComponent implements OnInit {
  public rows: any[] = [];
  public weekNumbers: number[] = [];
  public datePicker: DatePickerInnerComponent;
  - public CURRENT_THEME_TEMPLATE: any;
  public constructor(datePicker: DatePickerInnerComponent) {
  - this.CURRENT_THEME_TEMPLATE = isBs3()
  - ? TEMPLATE_OPTIONS.bs3
  - : TEMPLATE_OPTIONS.bs4;
  this.datePicker = datePicker;
  }
  