dashboard: integrate Flow, sketch message API (#15713)

* dashboard: minor design change

* dashboard: Flow integration, message API

* dashboard: minor polishes, exclude misspell linter

dashboard/assets/fa-only-woff-loader.js

@@ -0,0 +1,25 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// fa-only-woff-loader removes the .eot, .ttf, .svg dependencies of the FontAwesome library,
+// because they produce unused extra blobs.
+module.exports = function(content) {
+	return content
+		.replace(/src.*url(?!.*url.*(\.eot)).*(\.eot)[^;]*;/,'')
+		.replace(/url(?!.*url.*(\.eot)).*(\.eot)[^,]*,/,'')
+		.replace(/url(?!.*url.*(\.ttf)).*(\.ttf)[^,]*,/,'')
+		.replace(/,[^,]*url(?!.*url.*(\.svg)).*(\.svg)[^;]*;/,';');
+};