Fix/custom client advanced settings (#8066)

* fix: custom client, advanced settings

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* refact: custom client, default options

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* fix: cargo test

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* refact: remove prefix $ and unify option keys

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* refact: custom client, advanced options

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* debug custom client, advanced settings

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* custom client, advanced settings. Add filter-transfer to display settings

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* custom client, advanced settings

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* fix: custom client, advanced settings, codec

Signed-off-by: fufesou <shuanglongchen@yeah.net>

* fix: custom client, advanced settings, whitelist

Signed-off-by: fufesou <shuanglongchen@yeah.net>

---------

Signed-off-by: fufesou <shuanglongchen@yeah.net>

flutter/lib/desktop/pages/remote_tab_page.dart

@@ -428,7 +428,7 @@ class _ConnectionTabPageState extends State<ConnectionTabPage> {
       }
       ConnectionTypeState.init(id);
       _toolbarState.setShow(
-          bind.mainGetUserDefaultOption(key: 'collapse_toolbar') != 'Y');
+          bind.mainGetUserDefaultOption(key: kOptionCollapseToolbar) != 'Y');
       tabController.add(TabInfo(
         key: id,
         label: id,