add link button to admin page

- Added '🔗 Link' button next to each non-deleted file in admin page
- Links to /f/ViewID (the public download page)
- Opens in new tab

templates/admin.html

@@ -53,6 +53,13 @@
             text-decoration: none;
             text-transform: uppercase;
             box-shadow: 3px 3px 0px #000;
+
+            display: inline-flex;
+            align-items: center;
+            justify-content: center;
+        }
+        button {
+            line-height: 1;
         }
         button:hover, .button:hover { background: #000; color: #fff; box-shadow: none; transform: translate(2px, 2px); }
         button:active { background: #ff0000; color: #fff; }
@@ -180,16 +187,17 @@
                 <td>
                     <div class="btn-group">
                         {{if not .Deleted}}
+                        <a href="/f/{{.ViewID}}" target="_blank" class="button" title="Open download page">Link</a>
                         <form action="/api/files/admin/delete/{{.ID}}" method="GET" onsubmit="return openConfirm(event, 'TERMINATE', 'Kill this file? It will be removed from active storage.')">
-                            <button type="submit" style="background: #ffcccc;">Terminate</button>
+                            <button type="submit" class="button" style="background: #ffcccc;">Terminate</button>
                         </form>
                         {{else}}
                         <form action="/api/files/admin/reinstate/{{.ID}}" method="GET" onsubmit="return openConfirm(event, 'REINSTATE', 'Restore this file to active status?')">
-                            <button type="submit" style="background: #ccffcc;">Reinstate</button>
+                            <button type="submit" class="button" style="background: #ccffcc;">Reinstate</button>
                         </form>
                         {{end}}
                         <form action="/api/files/admin/delete/fr/{{.ID}}" method="GET" onsubmit="return openConfirm(event, 'FULL_WIPE', 'Wiping file and purging record? This is a permanent database scrub.')">
-                            <button type="submit">Full_Wipe</button>
+                            <button class="button" type="submit">Full_Wipe</button>
                         </form>
                     </div>
                 </td>