refactor: migrate to material symbols icon set

src/app/modules/map/widget/map-widget.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/>.
+  -->
+
 <div
   class="map-container"
   (leafletMapReady)="onMapReady($event)"
@@ -12,6 +27,6 @@
     size="small"
     [routerLink]="['/map', place.uid]"
   >
-    <ion-icon name="arrows-maximize"></ion-icon>
+    <ion-icon name="zoom_out_map"></ion-icon>
   </ion-button>
 </div>