ShareLinks: stop injecting the guest-link button into form dialogs

The action-sheet fallback matched any dialog with 2+ buttons, which
caught the Add to Collection dialog and stuck a Create guest link
button next to OK. Skip containers that have a select/text input/
textarea, since real action sheets are just a list of buttons/links.

manifest.json

@@ -13,8 +13,8 @@
                 "changelog": "Initial release: ShareLink button on the item menu, temporary guest users confined by tag policy, expiring one-use links, admin dashboard with revoke, and a configurable guest lockdown that hides tag/genre/studio/cast links, the add-to-playlist and add-to-collection actions, and other plugins' UI.",
                 "targetAbi": "10.11.0.0",
                 "sourceUrl": "https://github.com/Franciskid/jellyfin-plugin-sharelinks/releases/download/v1.0.0.0/sharelinks_1.0.0.0.zip",
-                "checksum": "b9d94ddab91e7078046711b77d6ef18b",
-                "timestamp": "2026-07-07T00:00:00Z"
+                "checksum": "d779dc06a710788d7db698f66d5690bc",
+                "timestamp": "2026-07-07T20:12:00Z"
             }
         ]
     }