added symbols for menu

Core/Core/ClientApp/angular.json

@@ -25,6 +25,7 @@
             ],
             "styles": [
               "node_modules/bootstrap/dist/css/bootstrap.min.css",
+              "node_modules/material-design-icons/iconfont/material-icons.css",
               "src/styles.css"
             ],
             "scripts": []

Core/Core/ClientApp/package.json

@@ -26,6 +26,7 @@
     "@angular/platform-server": "8.2.12",
     "@angular/router": "8.2.12",
     "@nguniversal/module-map-ngfactory-loader": "^8.1.1",
+    "@types/jquery": "^3.3.31",
     "angular-highcharts": "^8.0.3",
     "aspnet-prerendering": "^3.0.1",
     "bootstrap": "^4.3.1",
@@ -33,6 +34,7 @@
     "core-js": "^2.5.4",
     "highcharts": "^7.1.1",
     "jquery": "3.3.1",
+    "material-design-icons": "^3.0.1",
     "popper.js": "^1.16.0",
     "rxjs": "^6.5.3",
     "webpack-dev-server": "^3.9.0",

Core/Core/ClientApp/src/app/home/components/account-properties/account-properties.component.html

 <div>
-  <button mat-button [matMenuTriggerFor]="menu">Menu ▼</button>
+  <button mat-button [matMenuTriggerFor]="menu"><i class="material-icons" style="vertical-align: middle; margin-bottom:0.1em">menu</i> Menu</button>
   <mat-menu #menu="matMenu">
     <button mat-menu-item (click)="logout()">Odhlásit se</button>
     <button mat-menu-item (click)="openChangePasswordDialog()">Změnit heslo</button>