Update title to - "<network> Explorer"

frontend/src/app/services/seo.service.ts

@@ -7,7 +7,6 @@ import { StateService } from './state.service';
 })
 export class SeoService {
   network = '';
-  defaultTitle = 'mempool - Bitcoin Explorer';
 
   constructor(
     private titleService: Title,
@@ -16,15 +15,19 @@ export class SeoService {
     this.stateService.networkChanged$.subscribe((network) => this.network = network);
   }
 
-  setTitle(newTitle: string, prependNetwork = false) {
-    let networkName = '';
-    if (prependNetwork && this.network !== '') {
-      networkName = this.network.substr(0, 1).toUpperCase() + this.network.substr(1) + ' ';
-    }
-    this.titleService.setTitle(networkName + newTitle + ' - ' + this.defaultTitle);
+  setTitle(newTitle: string): void {
+    this.titleService.setTitle(newTitle + ' - ' + this.getTitle());
   }
 
-  resetTitle() {
-    this.titleService.setTitle(this.defaultTitle);
+  resetTitle(): void {
+    this.titleService.setTitle(this.getTitle());
+  }
+
+  getTitle(): string {
+    return 'mempool - ' + (this.network ? this.ucfirst(this.network) : 'Bitcoin') + ' Explorer';
+  }
+
+  ucfirst(str: string) {
+    return str.charAt(0).toUpperCase() + str.slice(1);
   }
 }