fix: backend menu bug following MR !21

src/wgl.jl

@@ -905,7 +905,7 @@ end
 function filemenu(controller; kwargs...)
     wd = getworkingdir(controller)
     dir = joinpath(wd.root, wd.path[])
-    browser = FileBrowser(dir; root=wd.root, upload_button=true)
+    browser = FileBrowser(dir; root=wd.root, upload_button=false)
     on(FileBrowsers.selectedfile(browser)) do file
         tryopenfile(controller, file; reload=true)
     end
@@ -916,9 +916,11 @@ function filemenu(controller; kwargs...)
         wd.path[] = dir
         wd.content[] = [d for (_, d) in browser.model.content[]]
     end
-    on(FilePickers.uploadedfile(browser)) do fileinfo
-        filepath = joinpath(workingdir[], fileinfo["name"])
-        saveinputfile(filepath, fileinfo["content"])
+    if FileBrowsers.supports_upload(browser)
+        on(FilePickers.uploadedfile(browser)) do fileinfo
+            filepath = joinpath(workingdir[], fileinfo["name"])
+            saveinputfile(filepath, fileinfo["content"])
+        end
     end
     return FileMenu(gethub(controller), browser)
 end
@@ -990,7 +992,7 @@ end
 function Bonito.jsrender(session::Session, bs::BackendMenu)
     node = lowerdom(session, bs)
     onjs(session, bs.backends.model_instances, js"""(options) => {
-         select = document.querySelector($(dom_selector(bs)) + ' > select');
+         select = document.querySelectorAll($(dom_selector(bs)) + ' > select')[1];
          LarvaTagger.updateSelectOptions(select, options);
     }""")
     return node