Further modified wireframes and removed old components

frontend/src/app/component/einstellungen/editieren/editieren.component.html

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+<app-navigation [activeLink]="'settings'"></app-navigation>
+<div class="content">
+  <div class="text-center">
+    <p class="font-weight-bold">RSS-Feed erstellen</p>
+    <div class="input-row">
+      <mat-form-field appearance="standard" class="input">
+        <mat-label>Vollständige URL des RSS-Feeds:</mat-label>
+        <input matInput placeholder="https://rss.orf.at/news.xml">
+      </mat-form-field>
+    </div>
+    <div class="input-row text-left">
+      <mat-form-field appearance="standard" class="input">
+        <mat-label>Folgende Stichwörter im Feed suchen:</mat-label>
+        <input matInput placeholder="Spiel, Spaß, Schokolade">
+      </mat-form-field>
+      <mat-checkbox>Alle Stichworte müssen enthalten sein</mat-checkbox>
+    </div>
+    <div class="input-row text-left">
+      <span>Optionales Icon:</span>
+      <br>
+      <img (click)="iconChooser()" class="feed-icon" src="{{icon}}" alt="Feed-Icon">
+      <input hidden type="file"
+             (change)="fileChangeEvent($event)"
+             id="feed-icon-picker" name="icon"
+             accept="image/png, image/svg+xml">
+    </div>
+    <div class="input-row text-left">
+      <mat-slide-toggle color="primary">Slide me!</mat-slide-toggle>
+    </div>
+    <div class="input-row margin-auto einstellungen_buttons_wrapper">
+      <button routerLink="/einstellungen" mat-raised-button>Abbrechen</button>
+      <button mat-raised-button><mat-icon>save</mat-icon> Speichern</button>
+    </div>
+  </div>
+</div>