fix: 弹窗高度增加容纳包统计行 + 文案调整

PanelPopup 高度 250->280 容纳新增的包统计行；
翻译文案：Total->流量总计、Packets->包统计

package/networkview.qml

@@ -320,7 +320,7 @@ AppletItem {
     PanelPopup {
         id: networkPopup
         width: 330
-        height: 250
+        height: 280
         popupX: DockPanelPositioner.x
         popupY: DockPanelPositioner.y
 

translations/jnetapplet_zh_CN.ts

@@ -79,12 +79,12 @@
     <message>
         <location filename="../package/components/NetworkPopup.qml" line="427"/>
         <source>Total</source>
-        <translation>总计</translation>
+        <translation>流量总计</translation>
     </message>
     <message>
         <location filename="../package/components/NetworkPopup.qml" line="474"/>
         <source>Packets</source>
-        <translation>包</translation>
+        <translation>包统计</translation>
     </message>
     <message>
         <location filename="../package/components/NetworkPopup.qml" line="483"/>