ux: show hotkey of popup buttons

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Views/LauncherPage.axaml

@@ -83,15 +83,17 @@
                             VerticalContentAlignment="Center"
                             Content="{DynamicResource Text.Sure}"
                             Click="OnPopupSure"
-                            HotKey="Enter"/>
+                            HotKey="Enter"
+                            ToolTip.Tip="Enter"/>
                     <Button Classes="flat"
                             Width="100" Height="28"
                             Margin="8,0,0,0"
                             Padding="0"
                             HorizontalContentAlignment="Center"
                             VerticalContentAlignment="Center"
                             Content="{DynamicResource Text.Cancel}"
-                            Click="OnPopupCancel"/>
+                            Click="OnPopupCancel"
+                            ToolTip.Tip="ESC"/>
                   </StackPanel>
 
                   <!-- Running -->