Fix some styles

SQUASH

src/app/components/shared/comment-page/comment-page.component.html

@@ -2,7 +2,7 @@
   <div fxLayout="row" fxLayoutAlign="center">
     <mat-toolbar>List of Questions
       <span class="fill-remaining-space"></span>
-      <button mat-icon-button color="accent" (click)="openSubmitDialog()">
+      <button mat-icon-button color="primary" (click)="openSubmitDialog()">
         <mat-icon>add_circle</mat-icon>
       </button></mat-toolbar>
   </div>

src/app/components/shared/comment-page/comment-page.component.scss

@@ -7,6 +7,7 @@ app-comment-list {
   width: 50px;
   height: 50px;
   margin-bottom: 20px;
+  margin-top: 20px;
 }
 
 mat-icon {
@@ -18,7 +19,6 @@ mat-icon {
 
 mat-toolbar {
   border-radius: 10px;
-  margin-bottom: 20px;
   background-color: #bbdefb;
   max-width: 800px;
 }