fix(ui): add github png icon (#1541)

(cherry picked from commit 4b797da)

Author: timonback

springwolf-ui/src/app/components/header/header.component.css

@@ -4,6 +4,12 @@
   width: 3em;
   display: block;
 }
+.github {
+  height: 2em;
+  width: 2em;
+  display: block;
+  filter: invert(100%);
+}
 
 :host ::ng-deep label,
 a {

springwolf-ui/src/app/components/header/header.component.html

@@ -69,7 +69,13 @@ <h1 class="width-s-hide">{{ title() }}</h1>
 
     &nbsp;
     <a href="https://github.com/springwolf/springwolf-core" target="_blank">
-      <mat-icon [svgIcon]="'github'" />
+      <img
+        src="assets/github.png"
+        class="github"
+        alt="Github"
+        height="1024"
+        width="1024"
+      />
     </a>
   </div>
 </mat-toolbar>

springwolf-ui/src/app/service/asset.service.ts

@@ -15,9 +15,9 @@ export class AssetService implements IAssetService {
   ) {}
 
   public load() {
-    this.iconRegistry.addSvgIcon(
-      "github",
-      this.sanitizer.bypassSecurityTrustResourceUrl("assets/github.svg")
-    );
+    // this.iconRegistry.addSvgIcon(
+    //   "github",
+    //   this.sanitizer.bypassSecurityTrustResourceUrl("assets/github.svg")
+    // );
   }
 }