Add .iol extension filter. Ref https://github.com/GNS3/gns3-gui/issues/3664

Author: grossmj

src/app/components/preferences/ios-on-unix/add-iou-template/add-iou-template.component.html

@@ -61,7 +61,7 @@ <h1 class="col">New IOU device template</h1>
             <div *ngIf="newImageSelected">
               <input
                 type="file"
-                accept=".bin"
+                accept=".bin, .image, .iol"
                 #file
                 class="nonvisible"
                 (change)="uploadImageFile($event)"

src/app/components/preferences/ios-on-unix/iou-template-details/iou-template-details.component.html

@@ -52,7 +52,7 @@ <h1 class="col">IOU device configuration</h1>
           </mat-form-field>
           <input
             type="file"
-            accept=".bin"
+            accept=".bin, .image, .iol"
             #file
             class="nonvisible"
             (change)="uploadImageFile($event)"