improve the colors of buttons in notes section (#2899)

src/app/shared/tabs/entity-notes-tab/entity-notes-tab.component.html

@@ -18,7 +18,7 @@
           cdkAutosizeMinRows="2"
         ></textarea>
       </mat-form-field>
-      <button mat-raised-button class="flex-1" color="primary" [disabled]="!noteForm.valid">
+      <button type="button" mat-raised-button class="flex-1" color="primary" [disabled]="!noteForm.valid">
         <fa-icon icon="plus" class="m-r-10"></fa-icon>{{ 'labels.buttons.Add' | translate }}
       </button>
     </form>
@@ -40,10 +40,24 @@
                 </div>
               </div>
               <div class="note-actions">
-                <button class="edit-btn" (click)="editNote(entityNote.id, entityNote.note, i)" title="Edit note">
+                <button
+                  type="button"
+                  mat-raised-button
+                  color="primary"
+                  (click)="editNote(entityNote.id, entityNote.note, i)"
+                  title="Edit note"
+                >
                   Edit
                 </button>
-                <button class="delete-btn" (click)="deleteNote(entityNote.id, i)" title="Delete note">Delete</button>
+                <button
+                  type="button"
+                  mat-raised-button
+                  color="warn"
+                  (click)="deleteNote(entityNote.id, i)"
+                  title="Delete note"
+                >
+                  Delete
+                </button>
               </div>
             </div>
           </div>