fix textarea font

src/app/modules/shows/show/song/song.component.html

@@ -24,6 +24,7 @@
   <mat-form-field *ngIf="edit" appearance="outline">
     <mat-label>Songtext</mat-label>
     <textarea matTooltip="Tonart ändern"
+              class="edit"
               [cdkTextareaAutosize]="true"
               [formControl]="editSongControl"
               matInput

src/app/modules/shows/show/song/song.component.less

@@ -78,6 +78,6 @@ button {
 
 }
 
-textarea {
+textarea.edit {
   font-family: 'Ubuntu Mono', monospace;
 }