fix: since ⌥ can not been used in HotKey property and ⌘+⌥+D has been used to show Dock, change the hotkey to open external merge tool to Ctrl+Shift+D/⌘+⇧+D

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

Author: love-linger

src/Views/DiffView.axaml

@@ -178,12 +178,12 @@
             <Button Classes="icon_button"
                     Width="28"
                     Command="{Binding OpenExternalMergeTool}"
-                    HotKey="{OnPlatform Ctrl+Alt+D, macOS=⌘+⌥+D}">
+                    HotKey="{OnPlatform Ctrl+Shift+D, macOS=⌘+Shift+D}">
               <ToolTip.Tip>
                 <TextBlock>
                   <Run Text="{DynamicResource Text.Diff.UseMerger}"/>
                   <Run Text=" "/>
-                  <Run Text="{OnPlatform Ctrl+Alt+D, macOS=⌘+⌥+D}" Foreground="{DynamicResource Brush.FG2}"/>
+                  <Run Text="{OnPlatform Ctrl+Shift+D, macOS=⌘+⇧+D}" Foreground="{DynamicResource Brush.FG2}"/>
                 </TextBlock>
               </ToolTip.Tip>
               <Path Width="12" Height="12" Stretch="Uniform" Data="{StaticResource Icons.OpenWith}"/>

src/Views/Hotkeys.axaml

@@ -149,7 +149,7 @@
           <TextBlock Grid.Row="3" Grid.Column="0" Classes="primary bold" Text="ESC"/>
           <TextBlock Grid.Row="3" Grid.Column="1" Margin="16,0,0,0" Text="{DynamicResource Text.Hotkeys.TextEditor.CloseSearch}" />
 
-          <TextBlock Grid.Row="4" Grid.Column="0" Classes="primary bold" Text="{OnPlatform Ctrl+Alt+D, macOS=⌘+⌥+D}"/>
+          <TextBlock Grid.Row="4" Grid.Column="0" Classes="primary bold" Text="{OnPlatform Ctrl+Shift+D, macOS=⌘+⇧+D}"/>
           <TextBlock Grid.Row="4" Grid.Column="1" Margin="16,0,0,0" Text="{DynamicResource Text.Hotkeys.TextEditor.OpenExternalMergeTool}" />
         </Grid>
       </StackPanel>