style<Histories>: remove commit detail panel's guide tips

src/Resources/Locales/en_US.xaml

@@ -274,11 +274,6 @@
     <sys:String x:Key="Text.Histories.GraphMode">Switch Curve/Polyline Graph Mode</sys:String>
     <sys:String x:Key="Text.Histories.DisplayMode">Switch Horizontal/Vertical Layout</sys:String>
     <sys:String x:Key="Text.Histories.Selected">SELECTED {0} COMMITS</sys:String>
-    <sys:String x:Key="Text.Histories.Guide">HISTORIES GUIDE</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_1">1. Select single commit to view detail</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_2">2. Select two commits to show differences</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_3">3. Select more than 2 commits to count</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_4">4. Open context menu to see more options</sys:String>
 
     <sys:String x:Key="Text.Init">Initialize Repository</sys:String>
     <sys:String x:Key="Text.Init.Path">Path :</sys:String>

src/Resources/Locales/zh_CN.xaml

@@ -273,11 +273,6 @@
     <sys:String x:Key="Text.Histories.GraphMode">切换曲线/折线显示</sys:String>
     <sys:String x:Key="Text.Histories.DisplayMode">切换横向/纵向显示</sys:String>
     <sys:String x:Key="Text.Histories.Selected">已选中 {0} 项提交</sys:String>
-    <sys:String x:Key="Text.Histories.Guide">操作说明</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_1">1. 单选时，显示选中提交的详细信息</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_2">2. 双选时，按选中顺序对比两个提交</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_3">3. 多选时，仅统计选中行数</sys:String>
-    <sys:String x:Key="Text.Histories.Guide_4">4. 右键用于操作选中的某个提交</sys:String>
 
     <sys:String x:Key="Text.Init">初始化新仓库</sys:String>
     <sys:String x:Key="Text.Init.Path">路径 ：</sys:String>

src/Views/Widgets/Histories.xaml

@@ -178,14 +178,7 @@
                         Margin="0,16"
                         FontSize="24" FontWeight="UltraBold" 
                         HorizontalAlignment="Center"
-                        Text="{DynamicResource Text.Histories.Guide}"/>
+                        Visibility="Collapsed"/>
-
-                    <StackPanel Orientation="Vertical" HorizontalAlignment="Center">
-                        <TextBlock Text="{DynamicResource Text.Histories.Guide_1}" FontSize="14" Margin="0,2"/>
-                        <TextBlock Text="{DynamicResource Text.Histories.Guide_2}" FontSize="14" Margin="0,2"/>
-                        <TextBlock Text="{DynamicResource Text.Histories.Guide_3}" FontSize="14" Margin="0,2"/>
-                        <TextBlock Text="{DynamicResource Text.Histories.Guide_4}" FontSize="14" Margin="0,2"/>
-                    </StackPanel>
                 </StackPanel>
             </Border>
         </Grid>

src/Views/Widgets/Histories.xaml.cs

@@ -236,9 +236,10 @@ namespace SourceGit.Views.Widgets {
             } else if (selected.Count > 2) {
                 mask.Visibility = Visibility.Visible;
                 txtCounter.Text = App.Text("Histories.Selected", selected.Count);
+                txtCounter.Visibility = Visibility.Visible;
             } else {
                 mask.Visibility = Visibility.Visible;
-                txtCounter.Text = App.Text("Histories.Guide");
+                txtCounter.Visibility = Visibility.Collapsed;
             }
         }