增加按钮提示文本

SpineViewer/Resources/Strings/en-us.xaml

@@ -21,6 +21,8 @@
 
     <!-- 浏览标签页 -->
     <s:String x:Key="Str_Filter">Filter</s:String>
+    <s:String x:Key="Str_ChangeCurrentDirectoryTooltip">Open Directory</s:String>
+    <s:String x:Key="Str_RefreshItemsTooltip">Refresh Items</s:String>
     <s:String x:Key="Str_FileDirectory">File Directory</s:String>
     <s:String x:Key="Str_FileName">File Name</s:String>
     <s:String x:Key="Str_AddSelectedItems">Import Selected Items</s:String>

SpineViewer/Resources/Strings/zh-cn.xaml

@@ -21,6 +21,8 @@
 
     <!-- 浏览标签页 -->
     <s:String x:Key="Str_Filter">筛选</s:String>
+    <s:String x:Key="Str_ChangeCurrentDirectoryTooltip">打开目录</s:String>
+    <s:String x:Key="Str_RefreshItemsTooltip">刷新列表项</s:String>
     <s:String x:Key="Str_FileDirectory">文件目录</s:String>
     <s:String x:Key="Str_FileName">文件名</s:String>
     <s:String x:Key="Str_AddSelectedItems">导入选中项</s:String>

SpineViewer/Views/MainWindow.xaml

@@ -106,8 +106,14 @@
                                             </Grid.ColumnDefinitions>
                                             <hc:TextBox hc:InfoElement.Placeholder="{StaticResource Str_Filter}"
                                                         Text="{Binding FilterString, UpdateSourceTrigger=PropertyChanged}"/>
-                                            <Button Grid.Column="1" hc:IconElement.Geometry="{StaticResource Geo_Folder}" Command="{Binding Cmd_ChangeCurrentDirectory}"/>
+                                            <Button Grid.Column="1" 
-                                            <Button Grid.Column="2" hc:IconElement.Geometry="{StaticResource Geo_ArrowRotateRight}" Command="{Binding Cmd_RefreshItems}"/>
+                                                    hc:IconElement.Geometry="{StaticResource Geo_Folder}" 
+                                                    Command="{Binding Cmd_ChangeCurrentDirectory}"
+                                                    ToolTip="{DynamicResource Str_ChangeCurrentDirectoryTooltip}"/>
+                                            <Button Grid.Column="2" 
+                                                    hc:IconElement.Geometry="{StaticResource Geo_ArrowRotateRight}" 
+                                                    Command="{Binding Cmd_RefreshItems}"
+                                                    ToolTip="{DynamicResource Str_RefreshItemsTooltip}"/>
                                         </Grid>
 
                                         <StatusBar DockPanel.Dock="Bottom">