desktop, remote toolbar, os account

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

flutter/lib/common/widgets/dialog.dart

@@ -503,11 +503,6 @@ _connectDialog(
     }
 
     submit() {
-      // to-do:
-      // username and password are about remote OS account.
-      // If the remote side is headless.
-      // The client side should login to remote OS account, to enable X desktop session.
-      // `username` and `password` will be used in the near future.
       final osUsername = osUsernameController?.text.trim() ?? '';
       final osPassword = osPasswordController?.text.trim() ?? '';
       final password = passwordController?.text.trim() ?? '';
@@ -565,7 +560,7 @@ _connectDialog(
       }
       return Column(
         children: [
-          descWidget(translate('login_linux_tooltip_tip')),
+          descWidget(translate('login_linux_tip')),
           DialogTextField(
             title: translate(DialogTextField.kUsernameTitle),
             controller: osUsernameController,

flutter/lib/desktop/pages/connection_page.dart

@@ -225,20 +225,16 @@ class _ConnectionPageState extends State<ConnectionPage>
                 children: [
                   Button(
                     isOutline: true,
-                    onTap: () {
-                      onConnect(isFileTransfer: true);
-                    },
+                    onTap: () => enterUserLoginAndPasswordDialog(
+                      'fdsfd',
+                      gFFI.dialogManager,
+                    ),
                     text: "Transfer File",
                   ),
                   const SizedBox(
                     width: 17,
                   ),
-                  Button(
-                      onTap: () => enterUserLoginAndPasswordDialog(
-                            'fdsfd',
-                            gFFI.dialogManager,
-                          ),
-                      text: "Connect"),
+                  Button(onTap: onConnect, text: "Connect"),
                 ],
               ),
             )

flutter/lib/desktop/widgets/remote_toolbar.dart

@@ -689,6 +689,26 @@ class _ControlMenu extends StatelessWidget {
         close();
       }
 
+      descWidget(String text) {
+        return Column(
+          children: [
+            Align(
+              alignment: Alignment.centerLeft,
+              child: Text(
+                text,
+                maxLines: 3,
+                softWrap: true,
+                overflow: TextOverflow.ellipsis,
+                style: TextStyle(fontSize: 16),
+              ),
+            ),
+            Container(
+              height: 8,
+            ),
+          ],
+        );
+      }
+
       return CustomAlertDialog(
         title: Row(
           mainAxisAlignment: MainAxisAlignment.center,
@@ -700,6 +720,7 @@ class _ControlMenu extends StatelessWidget {
         content: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
+            descWidget(translate("os_account_desk_tip")),
             DialogTextField(
               title: translate(DialogTextField.kUsernameTitle),
               controller: usernameController,