title: select dropdown value matching to be case insensitive when prefilled
body: <p>In Html template</p>
  
  <pre><code>&lt;select [(ngModel)]="modelName"&gt;
    &lt;option *ngFor="let ele of elements" [value]="element"&gt;{{ele}}&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>In .ts file </p>
  
  <pre><code>this.elements = ['ABCd', 'mnOp'];
  this.modelName = 'Abcd';
  </code></pre>
  
  <p>I Expect the value of the modelName 'ABCd' to be preselected from the list.</p>
  
  <p>Currently nothing is displayed in the Select box though the modelName contains value 'Abcd'</p>