Default主题fixbug (#421)

* default主题fixbug
1.补上误删的网页title
2.修复network页纵坐标数值显示不全
3.修复network，多个legend导致的遮挡主图表问题

* fix

* fix

* fix

* fix

* fix

* fix

resource/static/manifest-en-US.json

@@ -15,13 +15,13 @@
             "purpose": "maskable"
         },
         {
-            "src": "//static/manifest-512x512.png",
+            "src": "/static/manifest-512x512.png",
             "sizes": "512x512",
             "type": "image/png",
             "purpose": "any"
         },
         {
-            "src": "//static/manifest-512x512.png",
+            "src": "/static/manifest-512x512.png",
             "sizes": "512x512",
             "type": "image/png",
             "purpose": "maskable"