Fixed the navbar to the top.

Made the font of the inputs in vouchers bigger by 25%
Made the narration textarea minimum 5 lines
Changed the favicon to the old favicon

overlord/src/app/issue/issue.component.html

@@ -100,7 +100,8 @@
       </mat-table>
       <mat-form-field>
         <mat-label>Narration</mat-label>
-        <textarea matInput placeholder="Narration" formControlName="narration"></textarea>
+        <textarea matInput matTextareaAutosize matAutosizeMinRows="5" placeholder="Narration"
+                  formControlName="narration"></textarea>
       </mat-form-field>
     </form>
   </mat-card-content>