fix: fix broken monaco editor collapse icons (argoproj#8709)

Signed-off-by: Alexander Matyushentsev <AMatyushentsev@gmail.com>
Signed-off-by: wojtekidd <wojtek.cichon@protonmail.com>

Author: alexmt

ui/src/app/webpack.config.js

@@ -88,6 +88,10 @@ const config = {
                 {
                     from: 'node_modules/redoc/bundles/redoc.standalone.js',
                     to: 'assets/scripts/redoc.standalone.js'
+                },
+                {
+                    from: 'node_modules/monaco-editor/min/vs/base/browser/ui/codicons/codicon',
+                    to: 'assets/fonts'
                 }
             ]
         }),

ui/src/assets/fonts.css

@@ -1,3 +1,8 @@
+@font-face {
+	font-family: "codicon";
+	src: url("./fonts/codicon.ttf") format("truetype");
+}
+
 /* === Heebo - 300 */
 @font-face {
 	font-family: 'Heebo';