refactor: migrate to material symbols icon set

src/app/modules/map/item/map-item.component.html

@@ -1,3 +1,18 @@
+<!--
+  ~ Copyright (C) 2022 StApps
+  ~  This program is free software: you can redistribute it and/or modify it
+  ~  under the terms of the GNU General Public License as published by the Free
+  ~  Software Foundation, version 3.
+  ~
+  ~  This program is distributed in the hope that it will be useful, but WITHOUT
+  ~  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  ~  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+  ~  more details.
+  ~
+  ~  You should have received a copy of the GNU General Public License along with
+  ~  this program. If not, see <https://www.gnu.org/licenses/>.
+  -->
+
 <ion-card class="compact">
   <ion-card-header>
     <stapps-data-list-item
@@ -22,7 +37,7 @@
       class="close"
       (click)="onCloseClick()"
     >
-      <ion-icon name="circle-x"></ion-icon>
+      <ion-icon name="cancel" fill></ion-icon>
     </ion-button>
   </ion-card-header>
   <ion-card-content>