fix some bug on blue theme

src/app/services/DomSanitizer.service.ts

@@ -0,0 +1,20 @@
+import { Injectable, SecurityContext } from '@angular/core';
+import { DomSanitizer } from '@angular/platform-browser';
+import { Router } from '@angular/router';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class DomSanitizerService {
+
+
+
+  constructor(private sanitizer: DomSanitizer) {
+
+
+  }
+
+  sanitizeInput(input: string): string {
+    return this.sanitizer.sanitize(SecurityContext.HTML, input);
+  }
+}