[Select] Click twice to open options in searchable input

**Describe the bug**
It is needed to click twice to open the option list when it is searchable input.

**To Reproduce**
````
<dxc-select 
   label="Label" 
   helperText="HelperText" 
   searchable="true" 
   [options]="array"
   [optional]="true" 
   placeholder="Another placeholder">
</dxc-select>
````

**Expected behavior**
It should be done with one click.