title: Angular Material placeholder on input doesnt flow
body: <p>I'm using Angular Material 6.4.5 and I have problem with floating my placeholder. </p>
  
  <p>this is my html</p>
  
  <pre><code>&lt;mat-form-field class='search'&gt;
     &lt;input matInput placeholder='Search' value='book' [(ngModel)]='search'&gt;
  &lt;/mat-form-field&gt;
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/w8FNj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/w8FNj.png" alt="enter image description here"></a></p>
  
  <p>I also have problem with my mat-select it doesn't open</p>
  
  <pre><code>&lt;mat-form-field&gt;
     &lt;mat-select placeholder="Test"&gt;
       &lt;mat-option *ngFor="let foo of test" [value]="foo.id"&gt;{{foo.lastName}}&lt;/mat-option&gt;
     &lt;/mat-select&gt;
  &lt;/mat-form-field&gt;
  </code></pre>
  
  <p>Is there any idea what wrong, I tried whole afternoon and with no success.</p>