[editor] Replace Flex layout module with class in UnitViewComponent

projects/editor/src/app/components/unit-view/unit-view.component.css

@@ -23,6 +23,14 @@
   display: inherit;
 }
 
+.fx-column-start-stretch {
+  box-sizing: border-box;
+  display: flex;
+  flex-direction: column;
+  justify-content: start;
+  align-items: stretch;
+}
+
 .show-properties-button {
   padding-bottom: 140px;
 }

projects/editor/src/app/components/unit-view/unit-view.component.html

@@ -105,7 +105,7 @@
             </mat-menu>
 
           </ng-template>
-          <aspect-page-canvas *ngIf="pagesLoaded" [page]="page" fxLayout="column"></aspect-page-canvas>
+          <aspect-page-canvas *ngIf="pagesLoaded" class="fx-column-start-stretch" [page]="page"></aspect-page-canvas>
         </mat-tab>
         <mat-tab disabled>
           <ng-template mat-tab-label>