add center loading

src/app/shared/component/camera-dialog/camera-dialog.component.html

@@ -6,7 +6,7 @@
 </div>
 
 <div mat-dialog-content>
-  <div fxLayout="row" fxLayoutAlign="space-around center" fxLayoutGap="10px"
+  <div fxLayout="row" fxLayoutAlign="center center"  fxLayoutGap="10px"
        style="height: 50%;"
        *ngIf="!videoLoaded">
     <div class="circle-loader"></div>