cmd, dashboard: dashboard using React, Material-UI, Recharts (#15393)

* cmd, dashboard: dashboard using React, Material-UI, Recharts

* cmd, dashboard, metrics: initial proof of concept dashboard

* dashboard: delete blobs

* dashboard: gofmt -s -w .

* dashboard: minor text and code polishes

cmd/geth/usage.go

@@ -25,6 +25,7 @@ import (
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/internal/debug"
 	"gopkg.in/urfave/cli.v1"
+	"strings"
 )
 
 // AppHelpTemplate is the test template for the default, global app help topic.
@@ -97,6 +98,16 @@ var AppHelpFlagGroups = []flagGroup{
 			utils.EthashDatasetsOnDiskFlag,
 		},
 	},
+	//{
+	//	Name: "DASHBOARD",
+	//	Flags: []cli.Flag{
+	//		utils.DashboardEnabledFlag,
+	//		utils.DashboardAddrFlag,
+	//		utils.DashboardPortFlag,
+	//		utils.DashboardRefreshFlag,
+	//		utils.DashboardAssetsFlag,
+	//	},
+	//},
 	{
 		Name: "TRANSACTION POOL",
 		Flags: []cli.Flag{
@@ -268,6 +279,9 @@ func init() {
 			uncategorized := []cli.Flag{}
 			for _, flag := range data.(*cli.App).Flags {
 				if _, ok := categorized[flag.String()]; !ok {
+					if strings.HasPrefix(flag.GetName(), "dashboard") {
+						continue
+					}
 					uncategorized = append(uncategorized, flag)
 				}
 			}