Fix bug 【客户端】客户端安装过程中界面下方显示多余的蓝色占位条和冗余字段“Click Me“

fis/MainWindow.axaml

@@ -19,8 +19,6 @@
 					<titlebars:MacosTitleBar  Name="MacTitleBar" IsSeamless="False"/>
 				</Grid>
 				<Border Grid.Row="1" BorderThickness="0" Background="#FFFFFF" x:Name="BrowserBorder" />
-				<Button Grid.Row="2" Name="ClickMeButton" Content="Click Me!" Background="Green" FontSize="24"
-Click="ClickMeButton_Click" />
 			</Grid>
 		</Border>